Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2019	Nov. 04, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	Arcadia Biosciences, Inc.
Entity Central Index Key	0001469443
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		8,646,149
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Small Business	true
Extended Transition Period	true
Entity File Number	001-37383
Entity Tax Identification Number	81-0571538
Entity Address, Address Line One	202 Cousteau Place
Entity Address, Address Line Two	Suite 105
Entity Address, City or Town	Davis
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95618
City Area Code	530
Local Phone Number	756-7077
Entity Incorporation, State or Country Code	DE
Trading Symbol	RKDA
Title of 12(b) Security	Common
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 20,541	$ 11,998
Short-term investments	10,355	9,825
Accounts receivable	127	165
Unbilled revenue		3
Inventories — current	1,843	181
Prepaid expenses and other current assets	740	704
Total current assets	33,606	22,876
Property and equipment, net	1,283	395
Right of use asset	1,911
Inventories — noncurrent	495	746
Other noncurrent assets	7	7
Total assets	37,302	24,024
Current liabilities:
Accounts payable and accrued expenses	5,016	2,645
Amounts due to related parties	28	29
Notes payable - current	24
Unearned revenue — current	80	96
Operating lease liability — current	609
Other current liabilities	266	284
Total current liabilities	6,023	3,054
Notes payable — noncurrent	113
Operating lease liability — noncurrent	1,450
Common stock warrant liabilities	12,483	5,083
Other noncurrent liabilities	3,000	3,072
Total liabilities	23,069	11,209
Stockholders’ equity:
Common stock, $0.001 par value—150,000,000 shares authorized as of September 30, 2019 and December 31, 2018; 8,646,149 and 4,774,919 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	49	45
Additional paid-in capital	214,423	191,136
Accumulated deficit	(200,928)	(178,366)
Total Arcadia Biosciences stockholders’ equity	13,544	12,815
Non-controlling interest	689
Total stockholders' equity	14,233	12,815
Total liabilities and stockholders’ equity	$ 37,302	$ 24,024

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized	150,000,000	150,000,000
Common stock, issued	8,646,149	4,774,919
Common stock, outstanding	8,646,149	4,774,919

Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Total revenues	$ 392	$ 370	$ 753	$ 1,020
Operating expenses:
Research and development	1,931	1,334	5,387	4,524
Selling, general and administrative	4,477	3,011	10,434	8,581
Total operating expenses	6,585	4,469	16,145	13,536
Loss from operations	(6,193)	(4,099)	(15,392)	(12,516)
Interest expense	(3)		(3)
Other income, net	119	134	339	266
Initial loss on common stock warrant and common stock adjustment feature liabilities				(4,000)
Change in fair value of common stock warrant and common stock adjustment feature liabilities	(7,777)	8,421	(6,790)	5,986
Offering costs	(336)	(1)	(702)	(2,544)
Net (loss) income before income taxes	(14,190)	4,455	(22,548)	(12,808)
Income tax benefit (provision)	3	(5)	(14)	(26)
Net (loss) income	$ (14,187)	$ 4,450	$ (22,562)	$ (12,834)
Net (loss) income per share:
Basic and diluted	$ (2.04)	$ 0.93	$ (4.03)	$ (3.74)
Weighted-average number of shares used in per share calculations:
Basic and diluted	6,942,612	4,774,732	5,596,545	3,427,799
Other comprehensive income, net of tax
Unrealized losses on available-for-sale securities	$ (1)	$ (2)		$ (1)
Other comprehensive loss	(1)	(2)		(1)
Comprehensive (loss) income	(14,188)	4,448	$ (22,562)	(12,835)
Product
Revenues:
Total revenues	216	144	485	393
Operating expenses:
Cost of product revenues	177	124	324	431
License
Revenues:
Total revenues	17	10	17	100
Contract Research And Government Grants
Revenues:
Total revenues	$ 159	$ 216	$ 251	$ 527

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	June 2018 Offering [Member]	June 2019 Offering [Member]	September 2019 Offering [Member]	June 2018 Purchase Agreement [Member]	September 2019 Purchase Agreement [Member]	June 2019 Purchase Agreement [Member]	Common Stock [Member]	Common Stock [Member] June 2019 Offering [Member]	Common Stock [Member] Securities Purchase Agreement [Member]	Common Stock [Member] June 2018 Purchase Agreement [Member]	Common Stock [Member] September 2019 Purchase Agreement [Member]	Common Stock [Member] June 2019 Purchase Agreement [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] June 2018 Offering [Member]	Additional Paid-In Capital [Member] June 2019 Offering [Member]	Additional Paid-In Capital [Member] September 2019 Offering [Member]	Additional Paid-In Capital [Member] Securities Purchase Agreement [Member]	Additional Paid-In Capital [Member] June 2018 Purchase Agreement [Member]	Additional Paid-In Capital [Member] September 2019 Purchase Agreement [Member]	Additional Paid-In Capital [Member] June 2019 Purchase Agreement [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) [Member]	Non-Controlling Interest [Member]
Stockholders Equity, Beginning Balance at Dec. 31, 2017	$ 8,007							$ 42						$ 175,223								$ (167,257)	$ (1)
Stockholders Equity, Beginning Balance, Shares at Dec. 31, 2017								2,134,153
Impact of adoption of Topic 606 \| Topic 606 [Member]	2,371																					2,371
Issuance of shares related to employee stock option exercises	963													963
Issuance of shares related to employee stock option exercises, Shares								44,354
Issuance of shares related to employee stock purchase plan	6													6
Issuance of shares related to employee stock purchase plan, Shares								1,122
Issuance of shares					$ 4,978					$ 1	$ 2							$ (1)	$ 4,976
Issuance of shares, Shares										1,201,634	1,392,345
Issuance of placement agent warrants	526	$ 427												526	$ 427
Common stock adjustment feature	8,378													8,378
Offering costs					$ (912)														$ (912)
Stock-based compensation	1,550													1,550
Issuance of shares related to reverse stock split, Shares								1,311
Other comprehensive income	1																						$ 1
Net loss	(13,480)																					(13,480)
Stockholders Equity, Ending Balance at Dec. 31, 2018	12,815							$ 45						191,136								(178,366)
Stockholders Equity, Ending Balance, Shares at Dec. 31, 2018								4,774,919
Issuance of shares related to employee stock option exercises	$ 3													3
Issuance of shares related to employee stock option exercises, Shares	546							546
Issuance of shares related to employee stock purchase plan	$ 18													18
Issuance of shares related to employee stock purchase plan, Shares								8,536
Issuance of shares						$ 6,571	$ 3,303					$ 1	$ 2							$ 6,570	$ 3,301
Issuance of shares, Shares												1,318,828	1,489,575
Issuance of placement agent warrants			$ 198	$ 326												$ 198	$ 326
Issuance of shares related to the exercise of warrants issued with June offering			$ 5,269						$ 1							$ 5,268
Issuance of shares related to the exercise of warrants issued with June offering, Shares									1,053,745
Reclassification of common stock warrant liability balance with exercise	7,016													7,016
Offering costs						$ (796)	$ (487)													$ (796)	$ (487)
Stock-based compensation	1,870													1,870
Non-controlling interest contributions	689																							$ 689
Net loss	(22,562)																					(22,562)
Stockholders Equity, Ending Balance at Sep. 30, 2019	$ 14,233							$ 49						$ 214,423								$ (200,928)		$ 689
Stockholders Equity, Ending Balance, Shares at Sep. 30, 2019								8,646,149

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (14,187)	$ 4,450	$ (22,562)	$ (12,834)	$ (13,500)
Adjustments to reconcile net loss to cash used in operating activities:
Initial loss on common stock warrant and common stock adjustment feature liabilities				4,000
Change in fair value of common stock warrant and common stock adjustment feature liabilities	7,777	(8,421)	6,790	(5,986)
Offering costs	336	1	702	2,544
Depreciation and amortization			133	123
Lease amortization			530
Gain (Loss) on disposal of equipment			1	(3)
Net amortization of investment premium			(121)	(115)
Stock-based compensation			1,870	998
Changes in operating assets and liabilities:
Accounts receivable			38	1,038
Unbilled revenue			3	(164)
Inventories			(1,411)	301
Prepaid expenses and other current assets			(36)	(334)
Accounts payable and accrued expenses			2,425	(142)
Amounts due to related parties			(1)	(11)
Unearned revenue			(16)	(351)
Other current liabilities			3
Operating lease payments			(534)
Net cash used in operating activities			(12,186)	(10,936)	(13,600)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of property and equipment			1	10
Purchases of property and equipment			(878)	(89)
Purchases of investments			(18,458)	(22,871)
Proceeds from sales and maturities of investments			18,050	8,950
Net cash used in investing activities			(1,285)	(14,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock and warrants from Purchase Agreement				10,000
Payments of offering costs relating to Purchase Agreement				(1,308)
Principal payments on notes payable			(2)
Proceeds from exercise of warrants			5,269
Proceeds from exercise of stock options and ESPP purchases			21	969
Capital contributions received from non-controlling interest			689
Net cash provided by financing activities			22,014	22,480
Net increase (decrease) in cash and cash equivalents			8,543	(2,456)
Cash and cash equivalents — beginning of period			11,998	9,125	9,125
Cash and cash equivalents — end of period	$ 20,541	$ 6,669	20,541	6,669	$ 11,998
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for income taxes			2	24
NONCASH INVESTING AND FINANCING ACTIVITIES:
Offering costs in accounts payable and accrued expenses at end of period			21
Common stock warrants issued to placement agent and included in offering costs related to Purchase Agreement				526
Reclassification of common stock warrant liability balance with warrant exercises			7,016
Reclassification of common stock adjustment feature liability balance				8,378
Right of use assets obtained in exchange for new operating lease liabilities			2,328
Fixed assets acquired with notes payable			139
Purchases of fixed assets included in accounts payable and accrued expenses			6
June 2019 Offering [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock and warrants from Offering			7,500
Payments of offering costs			(663)
NONCASH INVESTING AND FINANCING ACTIVITIES:
Common stock warrants issued to placement agent and included in offering costs			86
September 2019 Offering [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock and warrants from Offering			10,000
Payments of offering costs			(776)
NONCASH INVESTING AND FINANCING ACTIVITIES:
Common stock warrants issued to placement agent and included in offering costs			95
June 2018 Offering [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock and warrants from Offering				14,000
Payments of offering costs			$ (24)	(1,181)
NONCASH INVESTING AND FINANCING ACTIVITIES:
Common stock warrants issued to placement agent and included in offering costs				$ 239

Description of Business and Basis of Presentation

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Description of Business and Basis of Presentation

1. Description of Business and Basis of Presentation

Organization

Arcadia Biosciences, Inc. (the “Company”) was incorporated in Arizona in 2002 and maintains its headquarters in Davis, California, with additional facilities in Phoenix, Arizona, American Falls, Idaho, and Molokai, Hawaii. The Company was reincorporated in Delaware in March 2015.

We develop and market high-value food ingredients and nutritional oils that help meet consumer demand for a healthier diet. We aim to create value across the agricultural production and supply chain beginning with enhanced crop productivity for farmers and ultimately delivering accelerated innovation in nutritional quality consumer foods. We use state of the art gene-editing technology and advanced breeding techniques to naturally enhance the nutritional quality of grains and oilseeds to address the rapidly evolving trends in consumer health and nutrition. In addition, we have developed high value crop productivity traits designed to enhance farm economics and have expanded to optimize and standardize the cannabis plant’s content, quality, resiliency and yield.

In February 2012, the Company formed Verdeca LLC (“Verdeca,” see Note 5), which is jointly owned with Bioceres Crop Solutions Corp. (“Bioceres”), a U.S. wholly owned subsidiary of Bioceres, S.A., an Argentine corporation. Bioceres, S.A. is an agricultural investment and development cooperative. Verdeca, which is consolidated by the Company, was formed to develop and deregulate soybean varieties using both partners’ agricultural technologies.

On August 9, 2019, the Company entered into a joint venture agreement with Legacy Ventures Hawaii, LLC (“Legacy,” see Note 6) to grow, extract, and sell hemp products. The new partnership, Archipelago Ventures Hawaii, LLC (“Archipelago”), combines the Company’s extensive genetic expertise and resources with Legacy’s experience in hemp extraction and sales.

Reverse Stock Split

In January 2018, the Company’s board of directors and its shareholders approved a reverse split of 1:20 on the Company’s issued and outstanding common stock which became effective on January 23, 2018. All issued and outstanding common stock, options to purchase common stock and per share amounts contained in the condensed consolidated financial statements have been retroactively adjusted to reflect the reverse stock split for all periods presented. The reverse stock split did not change the total number of authorized shares of common stock which remained at one hundred and fifty million shares.

Basis of Presentation and Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial statements and are in the form prescribed by the Securities and Exchange Commission (the “SEC”) in instructions to Form 10-Q and Rule 10-01 of Regulation S-X. In the opinion of management, the accompanying condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the periods indicated. All material intercompany accounts and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company, the Company’s subsidiary and joint venture, Archipelago, in which the Company has a controlling interest.

The Company uses a qualitative approach in assessing the consolidation requirement for variable interest entities (“VIEs”). This approach focuses on determining whether the Company has the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether the Company has the obligation to absorb losses, or the right to receive benefits, that could potentially be significant to the VIE. For all periods presented, the Company has determined that it is the primary beneficiary of Verdeca, which is a VIE. The Company evaluates its relationships with the VIEs upon the occurrence of certain significant events that affect the design, structure or other factors pertinent to the primary beneficiary determination. Interim results are not necessarily indicative of results for any other interim period or for the full fiscal year.

For all periods presented, the Company has determined that it has a controlling interest in Archipelago. The Company has determined that it is the primary beneficiary of the joint venture. Accordingly, the Company consolidates the entity in the condensed consolidated financial statements after eliminating intercompany transactions. For consolidated joint ventures, the non-controlling partner’s share of the assets, liabilities and operations of the joint venture is included in non-controlling interests as equity of the Company. The non-controlling partner’s interest is generally computed as the joint venture partner’s ownership percentage of Archipelago.

The information included in these condensed consolidated financial statements and notes thereto should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations included herein and Management’s Discussion and Analysis of Financial Condition and Results of Operations and the condensed consolidated financial statements and notes thereto for the fiscal year ended December 31, 2018 included in the Company’s Annual Report on Form 10-K, filed with the SEC on April 1, 2019.

Liquidity and Capital Resources

As of September 30, 2019, the Company had an accumulated deficit of $200.9 million, cash and cash equivalents of $20.5 million and short-term investments of $10.4 million. For the nine months ended September 30, 2019 and the twelve months ended December 31, 2018, the Company had net losses of $22.6 and $13.5 million, and net cash used in operations of $12.2 million and $13.6 million, respectively.

With cash and cash equivalents of $20.5 million and short-term investments of $10.4 million as of September 30, 2019, the Company believes that it currently has sufficient cash to fund its operations for at least the look forward period of 12 months from the issuance of these condensed consolidated financial statements. The Company’s ability to continue as a going concern is dependent on its future ability to generate profitable operations and its ability to obtain additional debt or equity financing, as necessary.

The Company may seek to raise additional funds through debt or equity financings. The Company may also consider entering into additional partner arrangements. The sale of additional equity would result in dilution to the Company’s stockholders. The incurrence of debt would result in debt service obligations, and the instruments governing such debt could provide for additional operating and financing covenants that could restrict operations. If the Company does require additional funds and is unable to secure adequate additional funding at terms agreeable to the Company, the Company may be forced to reduce spending, extend payment terms with suppliers, liquidate assets, or suspend or curtail planned development programs or operations. Any of these actions could materially harm the business, results of operations and financial condition.

Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2019

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

2. Recent Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-02, Leases (Topic 842). Based on the new standard, lessees recognize lease assets and lease liabilities for leases classified as operating leases under previous GAAP and disclose qualitative and quantitative information about leasing arrangements with terms longer than 12 months. The adoption required recording right-of-use assets and corresponding lease obligation liabilities for the current operating leases. The Company adopted ASU No. 2016-02 on January 1, 2019. See Note 8.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Additionally, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326 in April 2019 and ASU 2019-05, Financial Instruments — Credit Losses (Topic 326) — Targeted Transition Relief in May 2019. The amendments affect loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The amendments in this update will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the impact of the adoption of ASU No. 2016-13 on its condensed consolidated financial statements.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The amendments address cash flow issues such as debt prepayment or debt extinguishment costs and zero-coupon debt instruments. The amendments in this update are effective for fiscal years beginning after December 15, 2018, and interim periods within fiscal years beginning after December 15, 2019. Early adoption is permitted, including adoption in an interim period. The amendments are to be applied using a retrospective transition method to each period presented. If it is impractical to retrospectively apply, it can be applied prospectively as of the earliest date practicable. The Company adopted ASU No. 2016-15 on January 1, 2019 with no material impact to the condensed consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13 Fair Value Measurement (Topic 820) – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. The amendments affect any entity required to make disclosures about recurring or nonrecurring fair value measurements. The amendments will be effective for all entities for fiscal years beginning after December 15, 2019. The Company is currently evaluating the impact of the adoption of ASU No. 2018-13 on its condensed consolidated financial statements.

Inventory

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventory

3. Inventory

Raw materials costs consist primarily of SONOVA® Gamma Linolenic Acid (“GLA”) Safflower Oil seed production costs incurred by the Company’s contracted cooperators. Goods in process costs consist of GoodWheat^TM seed and grain production costs incurred primarily by the Company’s contracted cooperators. Finished goods inventories consist of GLA oil and GoodWheat^TM seed and grain that is available for sale. Inventory-current is comprised of the total of Goods in process plus a portion GLA oil within Finished Goods, which the Company anticipates to sell within 12 months. The remaining is recorded in Inventory-noncurrent. Inventories consist of the following (in thousands):

	September 30, 2019		December 31, 2018
Raw materials	$	41	$	41
Goods in process		479		—
Finished goods		1,818		886
Inventories	$	2,338	$	927

Investments and Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2019

Investments And Fair Value Of Financial Instruments [Abstract]

Investments and Fair Value of Financial Instruments

4. Investments and Fair Value of Financial Instruments

Available-for-Sale Investments

The Company classified short-term investments as “available-for-sale.” These short-term investments are free of trading restrictions. The investments are carried at fair value, based on quoted market prices or other readily available market information. Unrealized gains and losses, net of taxes, are included in accumulated other comprehensive income, which is reflected as a separate component of stockholder’s equity in the Condensed Consolidated Balance Sheets. Gains and losses are recognized when realized in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).

The following tables summarize the amortized cost and fair value of the available-for-sale investment securities portfolio at September 30, 2019 and December 31, 2018, and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive income:

(Dollars in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value
September 30, 2019
Cash equivalents:
Money market funds	$	16,188	$	—	$	—	$	16,188
Corporate securities		1,200		—		—		1,200
Commercial paper		2,246		—		—		2,246
Short-term investments:
Corporate securities		2,650		—		—		2,650
Treasury bills		1,488		—		—		1,488
Commercial paper		6,217		—		—		6,217
Total Assets at Fair Value	$	29,989	$	—	$	—	$	29,989

(Dollars in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value
December 31, 2018
Cash equivalents:
Money market funds	$	9,902	$	—	$	—	$	9,902
Commercial paper		1,345		—		—		1,345
Short-term investments:
Corporate Securities		656		—		—		656
Treasury Bills		1,195		—		—		1,195
Commercial paper		6,776		—		—		6,776
U.S. government securities		1,198		—		—		1,198
Total Assets at Fair Value	$	21,072	$	—	$	—	$	21,072

The Company did not have any investment categories that were in a continuous unrealized loss position for more than three months as of September 30, 2019. Unrealized gains and losses amounts would be included in accumulated other comprehensive income or loss; however, none were reported during the periods presented.

As of September 30, 2019, for fixed income securities that were in unrealized loss positions, the Company has determined that (i) it does not have the intent to sell any of these investments, and (ii) it is not more likely than not that it will be required to sell any of these investments before recovery of the entire amortized cost basis. The Company anticipates that it will recover the entire amortized cost basis of such fixed income securities and has determined that no other-than-temporary impairments associated with credit losses were required to be recognized during the three and nine months ended September 30, 2019.

Fair Value Measurement

Fair value accounting is applied for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the condensed consolidated financial statements on a recurring basis. Assets and liabilities recorded at fair value in the condensed consolidated financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels, which are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities, are as follows:

•

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company can access at the measurement date.

•

Level 2 inputs are observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

•

Level 3 inputs are unobservable inputs for the asset or liability.

The following table sets forth the fair value of the Company’s financial assets as of September 30, 2019 and December 31, 2018:

	Fair Value Measurements at September 30, 2019
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets at Fair Value
Cash equivalents:
Money market funds	$	16,188	$	—	$	—	$	16,188
Corporate securities		—		1,200		—		1,200
Commercial paper		—		2,246		—		2,246
Short-term investments:
Corporate securities		—		2,650		—		2,650
Treasury bills		1,488		—		—		1,488
Commercial paper		—		6,217		—		6,217
Total Assets at Fair Value	$	17,676	$	12,313	$	—	$	29,989

	Fair Value Measurements at December 31, 2018
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets at Fair Value
Cash equivalents:
Money market funds	$	9,902	$	—	$	—	$	9,902
Commercial paper		—		1,345		—		1,345
Short-term investments:
Corporate Securities		—		656		—		656
Treasury Bills		1,195		—		—		1,195
Commercial paper		—		6,776		—		6,776
U.S. government securities		1,198		—		—		1,198
Total Assets at Fair Value	$	12,295	$	8,777	$	—	$	21,072

The Company uses the market approach technique to value its financial instruments and there were no changes in valuation techniques during 2019 or 2018. The Company’s financial instruments consist primarily of cash and cash equivalents, accounts receivable, short-term investments and accounts payable and accrued liabilities. For accounts receivable, accounts payable and accrued liabilities, the carrying amounts of these financial instruments as of September 30, 2019 and December 31, 2018 were considered representative of their fair values due to their short term to maturity or repayment. Cash equivalents are carried at cost, which approximates their fair value.

The Company’s Level 3 liabilities, which were measured and recorded on a recurring basis, consist of liabilities related to the March 2018 Purchase Agreement, the June 2018 Offering, the June 2019 Offering and the September 2019 Offering described in Note 9. The following table sets forth the establishment of these liabilities, as well as a summary of the changes in the fair value (in thousands):

	(Level 3)
(Dollars in thousands)	Common Stock Warrant Liability - March 2018 Purchase Agreement		Common Stock Warrant Liability - June 2018 Offering		Common Stock Warrant Liability - June 2019 Offering			Common Stock Warrant Liability - September 2019 Offering			Total
Balance as of December 31, 2018	$	2,354	$	2,729	$	—		$	—		$	5,083
Common stock and warrants issued in conjunction with June 2019 Offering		—		—		4,198			—			4,198
Common stock and warrants issued in conjunction with September 2019 Offering		—		—		—			3,428			3,428
Change in fair value		1,481		1,810		4,491			(992	)		6,790
Exercise of warrants		—		—		(7,016	)		—			(7,016	)
Balance as of September 30, 2019	$	3,835	$	4,539	$	1,673		$	2,436		$	12,483

In determining the fair value, the Company uses various valuation approaches within the fair value measurement framework. The valuation methodologies used for the Company’s instruments measured at fair value and their classification in the valuation hierarchy are summarized below:

•

Money market funds, treasury bills, and U.S. government securities – Investments in money market funds, treasury bills, and U.S. government securities are classified within Level 1. At September 30, 2019 and December 31, 2018 these investments were included on the condensed consolidated balance sheets in cash and cash equivalents and short-term investments.

•

Commercial paper, corporate securities – Investments in commercial paper and corporate securities are classified within Level 2. At September 30, 2019 and December 31, 2018, these investments were included on the condensed consolidated balance sheets as short-term investments. At September 30, 2019, corporate securities and commercial paper were included on the condensed consolidated balance sheets as cash and cash equivalents for those purchased with 90 days or less to maturity from the trade date.

•

March 2018 Purchase Agreement common stock warrant liability – The Company has outstanding warrants to purchase 1,282,832 shares of common stock that it issued to certain accredited investors and its placement agent on March 22, 2018 (as described in Note 9). The common stock warrants were classified as a liability within Level 3 due to a contingent cash payment feature. The estimated fair value of the common stock warrant liability was remeasured at September 30, 2019 utilizing a Black Scholes Merton Model (“Black Scholes Model”) with the changes recorded on the Company’s condensed consolidated statements of operations and comprehensive income (loss).

•

June 2018, June 2019, & September 2019 Offering common stock warrant liabilities – The Company had outstanding warrants to purchase 1,392,345, 1,489,575, and 659,414 shares of common stock that it issued to certain accredited investors on June 14, 2018, June 14, 2019, and September 10, 2019, respectively (as described in Note 9). In August and September 2019, investors exercised 1,053,745 warrants issued under the June 2019 Offering. Warrants to purchase 435,830 shares of common stock at September 30, 2019 held by investors remain outstanding. The common stock warrants are classified as a liability within Level 3 due to a contingent cash payment feature. The estimated fair value of the outstanding common stock warrant liabilities was remeasured at September 30, 2019 utilizing a Black Scholes Model with the changes recorded on the Company’s condensed consolidated statements of operations and comprehensive income (loss).

Consolidated Joint Venture

9 Months Ended

Sep. 30, 2019

Equity Method Investments And Joint Ventures [Abstract]

Consolidated Joint Venture

6. Consolidated Joint Venture

On August 9, 2019, the Company and Legacy Ventures Hawaii, LLC, a Nevada limited liability company (“Legacy”), formed Archipelago Ventures Hawaii, LLC, a Delaware limited liability company and entered into a Limited Liability Company Operating Agreement (the “Operating Agreement”). The Company and Legacy formed Archipelago to develop, extract and commercialize hemp-derived products from industrial hemp grown in Hawaii.

Pursuant to the Operating Agreement, a joint operating committee consisting of two individuals appointed by the Company and two individuals appointed by Legacy will manage Archipelago. The Company and Legacy hold 50.75% and 49.25% percentage interests in Archipelago, respectively, and have made capital contributions to Archipelago of $709,000 and $689,000, respectively, as determined by the joint operating committee. The Operating Agreement includes indemnification rights, non-competition obligations, and certain rights and obligations in connection with the transfer of membership interests, including rights of first refusal.

We consolidate Archipelago in our condensed consolidated financial statements after eliminating intercompany transactions. There was no income or loss recorded as other income on the condensed consolidated statements of income (loss) for the three and nine months ended September 30, 2019. Legacy’s equity interests are presented as noncontrolling interests on our condensed consolidated balance sheets. Refer to Note 1 for basis of presentation.

Leases

9 Months Ended

Sep. 30, 2019

Lessee Disclosure [Abstract]

Leases

8. Leases

Operating Leases

As of September 30, 2019, the Company leases office space in Davis, CA and Phoenix, AZ, as well as additional buildings, land and equipment. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis. The Company subleases a portion of the Davis office lease and greenhouse to third parties. The Company does not currently have any finance leases or other material leases that have not yet commenced.

Some leases (the warehouse, greenhouse and a copy machine) include one or more options to renew, with renewal terms that can extend the lease term from one to six years. The exercise of lease renewal options is at the Company’s sole discretion.

The Company’s lease agreements do not contain any material variable lease payments, material residual value guarantees or material restrictive covenants. Leases consisted of the following (in thousands):

Leases	Classification	September 30, 2019		June 30, 2019		March 31, 2019
Assets
Operating lease assets	Right of use asset	$	1,911	$	2,051	$	2,193
Total leased assets		$	1,911	$	2,051	$	2,193
Liabilities
Current - Operating	Operating lease liability- current	$	609	$	594	$	574
Noncurrent - Operating	Operating lease liability- noncurrent		1,450		1,609		1,771
Total leased liabilities		$	2,059	$	2,203	$	2,345

Lease Cost	Classification	For the Nine Months Ended September 30, 2019			For the Three Months Ended September 30, 2019
Operating lease cost	SG&A and R&D Expenses	$	529		$	177
Short term lease cost(1)	R&D Expenses		138			45
Sublease income(2)	SG&A and R&D Expenses		(40	)		(13	)
Net lease cost		$	627		$	209

(1)	Short term lease cost consists of field trial lease agreements with a lease term of 12 months or less.

(2)	Sublease income is recorded as a credit to lease expense.

Lease Term and Discount Rate

September 30, 2019

June 30, 2019

March 31, 2019

Weighted-average remaining

lease term (years)

2.2

2.4

2.6

Weighted-average discount rate

Private Placement and Registered Direct Offering

9 Months Ended

Sep. 30, 2019

Warrants And Rights Note Disclosure [Abstract]

Private Placement and Registered Direct Offering Disclosure

9. Private Placement and Registered Direct Offering

Private Placement (2018)

On March 22, 2018, the Company issued 300,752 shares of its common stock (“Common Stock”) and warrants to purchase up to 300,752 shares of Common Stock with an initial exercise price equal to $45.75 (the “March 2018 Warrants”), in a private placement (the “March 2018 Private Placement”) in accordance with a securities purchase agreement (the “March 2018 Purchase Agreement”) entered into with certain institutional and accredited investors (collectively, the “Purchasers”) on March 19, 2018. The number of shares of Common Stock, the number and exercise price of the March 2018 Warrants issued to the Purchasers were subject to adjustments as provided in the March 2018 Purchase Agreement. The March 2018 Warrants are immediately exercisable, subject to certain ownership limitations, and expire five years after the date of issuance.

Following the adjustments as provided in the March 2018 Purchase Agreement, the number of shares issued to the Purchasers was 1,201,634, the total number of shares issuable upon exercise of the March 2018 Warrants was 1,282,832 and the per share exercise price of the March 2018 Warrants was $10.7258. These condensed consolidated financial statements reflect these additional issuances.

The aggregate net proceeds received by the Company from the March 2018 Private Placement was $8.7 million, consisting of gross proceeds of $10.0 million less offering costs of $1.3 million.

The adjustment feature for the Common Stock and the March 2018 Warrants were determined to be liabilities based on each instrument’s adjustment features and the contingent cash payment feature of the common stock warrants. The liabilities were accounted for at their respective fair values at inception using a Monte Carlo simulation model with the following assumptions: volatility of 100 percent, stock price of $32.52 and risk-free rate of 2.63%. At inception, the fair values of the Common Stock adjustment feature and the March 2018 Warrant liabilities were $3.8 million and $10.2 million, respectively. As the combined value of the liabilities exceeded the $10.0 million of proceeds, no value was assigned to the Common Stock issued and an initial loss of $4.0 million was recognized. The liabilities are marked-to-market and were valued at $15.9 million at March 31, 2018, resulting in an additional loss of $1.9 million in the first quarter of 2018.

In May 2018, following the March 2018 Private Placement’s final adjustment, the terms of the March 2018 Warrants and the number of Common Stock shares issuable in the March 2018 Private Placement became known and fixed. As a result, the Common Stock adjustment feature liability was marked-to-market and valued at $8.4 million at May 7, 2018, resulting in an additional loss of $2.4 million recognized in the second quarter of 2018. The Company subsequently reclassified the Common Stock adjustment feature liability’s balance of $8.4 million to stockholders’ equity. The March 2018 Warrant liability was marked-to-market and valued at $6.3 million at March 31, 2019, resulting in expense of $4.0 million recognized in the first quarter of 2019. The March 2018 Warrant liability was marked-to-market and valued at $2.2 million at June 30, 2019, resulting in income of $4.1 million recognized in the second quarter of 2019. The March 2018 Warrant liability was marked-to-market and valued at $3.8 million at September 30, 2019, resulting in expense of $1.6 million recognized in the third quarter of 2019 recognized.

Offering Costs

In connection with the March 2018 Private Placement, the Company paid to a placement agent an aggregate fee equal to $850,000. The Company also granted warrants to purchase a total of 15,038 shares of common stock (the “March 2018 Placement Agent Warrants”) that have an exercise price per share equal to $41.5625 and a term of five years. The March 2018 Placement Agent Warrants were issued for services performed by the placement agent as part of the March 2018 Private Placement and were treated as offering costs. The value of the March 2018 Placement Agent Warrants was determined to be $526,000 using the Black-Scholes Model with input assumptions including the Company’s stock price, expected life of the warrants, stock price volatility determined from the Company’s historical stock prices and the volatility of a peer group, and the risk-free interest rate for the term of the warrants. The Company incurred additional offering costs totaling $458,000 that consist of direct incremental legal, advisory, accounting and filing fees relating to the March 2018 Private Placement. The offering costs, inclusive of the March 2018 Placement Agent Warrants, totaled $1.8 million, all of which was expensed in 2018.

Registered Direct Offering (2018)

On June 11, 2018, the Company entered into agreements with several institutional and accredited investors (the “June 2018 Purchase Agreement”) for the purchase of 1,392,345 shares of its common stock at a purchase price of $9.93 per share for gross proceeds of $13.8 million (the “June 2018 Offering”). The 1,392,345 shares of Common Stock sold in the June 2018 Offering were issued pursuant to a prospectus, dated June 8, 2018, and a prospectus supplement dated June 11, 2018, in connection with a takedown from the Company’s shelf Registration Statement on Form S-3 (File No. 333-224893). The June 2018 Offering closed on June 14, 2018.

Additionally, in a concurrent private placement (the “June 2018 Private Placement”), the Company issued to the investors unregistered warrants to purchase up to 1,392,345 shares of Common Stock at a purchase price per warrant of $0.125, for gross proceeds of $174,000 (the “June 2018 Warrants”). The June 2018 Warrants, and the shares of Common Stock underlying the June 2018 warrants, have not been registered with the SEC and have an exercise price of $9.94 per share. Subject to certain ownership limitations, the June 2018 Warrants are exercisable upon issuance and expire five and one-half years after the date of issuance.

The aggregate net proceeds received by the Company for the June 2018 Offering were $12.8 million, consisting of gross proceeds of $14.0 million less offering costs of $1.2 million.

The June 2018 Warrants were determined to be a liability as they have a contingent cash payment feature. The June 2018 Warrants were accounted for at their fair value at inception using the Black Scholes Model with the following assumptions: volatility of 108 percent, stock price of $8.20 and risk-free rate of 2.83%. At inception, the fair value of the June 2018 Warrants was $9.0 million and the remaining $5.0 million of the $14.0 million of proceeds was allocated to the Common Stock using the residual method and accounted for as stockholders’ equity. The June 2018 Warrants were marked-to-market and valued at $7.3 million at March 31, 2019, resulting in expense of $4.5 million recognized in the first quarter of 2019. The June 2018 Warrant liability was marked-to-market and valued at $2.6 million at June 30, 2019, resulting in income of $4.6 million recognized in the second quarter of 2019. The June 2018 Warrants were marked-to-market and valued at $4.5 million at September 30, 2019, resulting in expense of $1.9 million recognized in the third quarter of 2019.

Offering Costs

In connection with the June 2018 Offering, the Company paid to a placement agent an aggregate fee equal to $980,000. The Company also granted warrants to purchase a total of 69,617 shares of common stock (the “June 2018 Placement Agent Warrants”) that have an exercise price per share equal to $12.568 and a term of five years. The June 2018 Placement Agent Warrants were issued for services performed by the placement agent as part of the June 2018 Offering and were treated as offering costs. The value of the June 2018 Placement Agent Warrants was determined to be $427,000 using the Black-Scholes Model with input assumptions including the Company’s stock price, expected life of the warrants, stock price volatility determined from the Company’s historical stock prices and the volatility of a peer group, and the risk-free interest rate for the term of the warrants. The Company incurred additional offering costs totaling $226,000 that consist of direct incremental legal, advisory, accounting and filing fees relating to the June 2018 Offering. The offering costs, inclusive of the June 2018 Placement Agent Warrants, totaled $1.6 million and allocated to the June 2018 Warrants and the Common Stock using their relative fair values. A total of $721,000 was allocated to the June 2018 Warrants which was expensed in 2018. The remaining $912,000 was allocated to the common stock and offset to additional paid in capital.

Registered Direct Offering (June 2019)

On June 12, 2019, the Company entered into a securities purchase agreement with certain institutional and accredited investors (the “June 2019 Purchase Agreement”) relating to the offering and sale of 1,489,575 shares of its common stock at a purchase price of $4.91 per share for gross proceeds of $7.31 million (the “June 2019 Offering”). The 1,489,575 shares of Common Stock sold in the June 2019 Offering were issued pursuant to a prospectus, dated June 8, 2018, and a prospectus supplement dated June 12, 2019, in connection with a takedown from the Company’s shelf Registration Statement on Form S-3 (File No. 333-224893). The June 2019 Offering closed on June 14, 2019.

Additionally, in a concurrent private placement (the “June 2019 Private Placement”), the Company issued to the investors unregistered warrants to purchase up to 1,489,575 shares of Common Stock at a purchase price per warrant of $0.125, for gross proceeds of $186,000 (the “June 2019 Warrants”). The June 2019 Warrants, and the shares of Common Stock underlying the June 2019 warrants, have not been registered with the SEC and have an exercise price of $5.00 per share. Subject to certain ownership limitations, the June 2019 Warrants are exercisable upon issuance and expire five and one-half years after the date of issuance.

The aggregate net proceeds received by the Company for the June 2019 Offering were $6.9 million, consisting of gross proceeds of $7.5 million less offering costs of $641,000. The Company intends to use the net proceeds from this offering for general corporate purposes, including, but not limited to, hemp germplasm acquisition, breeding and research activities for Arcadia Specialty Genomics^TM (“ASG”), the scale-up of GoodWheat^TM and for general and administrative expenses.

The June 2019 Warrants were determined to be a liability as they have a contingent cash payment feature. The June 2019 Warrants were accounted for at their fair value at inception using the Black Scholes Model with the following assumptions: volatility of 108 percent, stock price of $3.66 and risk-free rate of 1.88%. At inception, the fair value of the June 2019 Warrants was $4.2 million and the remaining $3.3 million of the $7.5 million of proceeds was allocated to the Common Stock using the residual method and accounted for as stockholders’ equity. The June 2019 Warrant liability was marked-to-market and valued at $3.4 million at June 30, 2019, resulting in income of $0.8 million recognized in the second quarter of 2019. In August and September 2019, investors exercised 1,053,745 warrants, generating cash proceeds totaling $5.3 million. The June 2019 Warrants were marked-to-market at the time of exercise and valued at $9.9 million, resulting in expense recognized of $6.5 million. Of the $9.9 million warrant liability balance, $7.0 million was allocated to the exercised warrants and reclassified to stockholders’ equity with the remaining $2.9 million attributed to the unexercised warrants. The 435,830 June 2019 Warrants outstanding were marked to market and valued at $1.6 million at September 30, 2019, resulting in income of $1.2 million for net expense of $5.3 million recognized in the third quarter of 2019.

Offering Costs

In connection with the June 2019 Offering, the Company paid to a placement agent an aggregate fee equal to $525,000. The Company also granted warrants to purchase a total of 74,479 shares of common stock (“June 2019 Placement Agent Warrants”) that have an exercise price per share equal to $6.2938 and a term of five years. The June 2019 Placement Agent Warrants were issued for services performed by the placement agent as part of the June 2019 Offering and were treated as offering costs. The value of the June 2019 Placement Agent Warrants was determined to be $198,000 using the Black-Scholes Model with input assumptions including the Company’s stock price, expected life of the warrants, stock price volatility determined from the Company’s historical stock prices and the volatility of a peer group, and the risk-free interest rate for the term of the warrants. The Company incurred additional offering costs totaling $115,000 that consist of direct incremental legal, advisory and filing fees relating to the June 2019 Offering. The offering costs, inclusive of the June 2019 Placement Agent Warrants, totaled $0.8 million and were allocated to the June 2019 Warrants and the Common Stock using their relative fair values. A total of $375,000 was allocated to the June 2019 Warrants of which $365,000 and $10,000 was expensed in the second and third quarter of 2019, respectively. The remaining $487,000 was allocated to the common stock and offset to additional paid in capital.

Registered Direct Offering (September 2019)

On September 5, 2019, the Company entered into a securities purchase agreement with certain institutional and accredited investors (the “September 2019 Purchase Agreement”) relating to the offering and sale of 1,318,828 shares of its common stock at a purchase price of $7.52 per share for gross proceeds of $9.92 million (the “September 2019 Offering”). The 1,318,828 shares of Common Stock sold in the September 2019 Offering were issued pursuant to a prospectus, dated June 8, 2018, and a prospectus supplement dated September 9, 2019, in connection with a takedown from the Company’s shelf Registration Statement on Form S-3 (File No. 333-224893). The September 2019 Offering closed on September 10, 2019.

Additionally, in a concurrent private placement (the “September 2019 Private Placement”), the Company issued to the investors unregistered warrants to purchase up to 659,414 shares of Common Stock at a purchase price per warrant of $0.125, for gross proceeds of $82,000 (the “September 2019 Warrants”). The September 2019 Warrants, and the shares of Common Stock underlying the September 2019 warrants, have not been registered with the SEC and have an exercise price of $7.52 per share. Subject to certain ownership limitations, the September 2019 Warrants are exercisable upon issuance and expire five and one-half years after the date of issuance.

The aggregate net proceeds received by the Company for the September 2019 Offering were $9.2 million, consisting of gross proceeds of $10.0 million less offering costs of $797,000. The Company intends to use the net proceeds from this offering for general corporate purposes and to pursue a range of near-term growth opportunities, including, but not limited to, hemp germplasm acquisition, breeding and research activities, the scale-up of GoodWheat^TM and general and administrative expenses.

The September 2019 Warrants were determined to be a liability as they have a contingent cash payment feature. The September 2019 Warrants were accounted for at their fair value at inception using the Black Scholes Model with the following assumptions: volatility of 116 percent, stock price of $6.34 and risk-free rate of 1.60%. At inception, the fair value of the September 2019 Warrants was $3.4 million and the remaining $6.6 million of the $10.0 million of proceeds was allocated to the Common Stock using the residual method and accounted for as stockholders’ equity. The September 2019 Warrants were marked-to-market and valued at $2.4 million at September 30, 2019, resulting in income of $1.0 million recognized in the third quarter of 2019.

Offering Costs

In connection with the September 2019 Offering, the Company paid to a placement agent an aggregate fee equal to $770,000. The Company also granted warrants to purchase a total of 65,942 shares of common stock (“September 2019 Placement Agent Warrants”) that have an exercise price per share equal to $9.4781 and a term of five years. The September 2019 Placement Agent Warrants were issued for services performed by the placement agent as part of the September 2019 Offering and were treated as offering costs. The value of the September 2019 Placement Agent Warrants was determined to be $326,000 using the Black-Scholes Model with input assumptions including the Company’s stock price, expected life of the warrants, stock price volatility determined from the Company’s historical stock prices and the volatility of a peer group, and the risk-free interest rate for the term of the warrants. The Company incurred additional offering costs totaling $97,000 that consist of direct incremental legal, advisory and filing fees relating to the September 2019 Offering. The offering costs, inclusive of the September 2019 Placement Agent Warrants, totaled $1.1 million and were allocated to the September 2019 Warrants and the Common Stock using their relative fair values. A total of $326,000 was allocated to the September 2019 Warrants which was expensed in the third quarter of 2019. The remaining $796,000 was allocated to the common stock and offset to additional paid in capital.

Stock-Based Compensation and Warrants

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Share Based Payments And Warrants [Abstract]

Stock-Based Compensation and Warrants

10. Stock-Based Compensation and Warrants

Stock Incentive Plans

The Company has two equity incentive plans: the 2006 Stock Plan (“2006 Plan”) and the 2015 Omnibus Equity Incentive Plan (“2015 Plan”).

In 2006, the Company adopted the 2006 Plan, which provided for the granting of stock options to executives, employees, and other service providers under terms and provisions established by the Board of Directors. The Company granted non-statutory stock options (“NSOs”) under the 2006 Plan until May 2015, when the 2006 Plan was terminated for future awards. The 2006 Plan continues to govern the terms of options that remain outstanding and were issued under the 2006 Plan. The 2015 Plan became effective in May 2015 and all shares that were reserved, but not issued, under the 2006 Plan were assumed by the 2015 Plan. Upon effectiveness, the 2015 Plan had 154,387 shares of common stock reserved for future issuance, which included 10,637 shares under the 2006 Plan that were transferred to and assumed by the 2015 Plan. The 2015 Plan provides for automatic annual increases in shares available for grant. In addition, shares subject to awards under the 2006 Plan that are forfeited or canceled will be added to the 2015 Plan. The 2015 Plan provides for the grant of incentive stock options (“ISOs”), NSOs, restricted stock awards, stock units, stock appreciation rights, and other forms of equity compensation, all of which may be granted to employees, officers, non-employee directors, and consultants. The ISOs and NSOs will be granted at a price per share not less than the fair value at the date of grant. Options granted generally vest over a four-year period, with 25% vesting at the end of one year and the remaining vesting monthly thereafter; however, the options granted in the third quarter of 2018 vest over a two-year period, vesting monthly on a pro-rated basis. Options granted, once vested, are generally exercisable for up to 10 years after grant.

In June 2019, the shareholders approved an amendment to the Company’s 2015 Plan for a one-time increase to the number of shares of common stock that may be issued under the 2015 Plan by 120,000 shares. As of September 30, 2019, a total of 659,490 shares of common stock were reserved for issuance under the 2015 Plan, of which 29,568 shares of common stock are available for future grant. As of September 30, 2019, a total of 61,079 and 629,922 options are outstanding under the 2006 and 2015 Plans, respectively.

A summary of activity under the stock incentive plans is as follows (in thousands, except share data and price per share):

	Shares Subject to Outstanding Options			Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding — Balance at December 31, 2018		530,044		$	35.53	$	—
Options granted		186,571			5.16
Options exercised		(546	)		4.63
Options forfeited		(20,718	)		46.09
Options expired		(4,350	)		7.07
Outstanding — Balance at September 30, 2019		691,001		$	27.18	$	24
Vested and expected to vest — September 30, 2019		683,076		$	27.38	$	24
Exercisable —September 30, 2019		426,175		$	37.82	$	17

As of September 30, 2019, there was $1.2 million of unrecognized compensation cost related to unvested stock-based compensation grants that will be recognized over the weighted-average remaining recognition period of 1.8 years.

On August 22, 2019, Rajendra Ketkar provided notice to the Company of his retirement as Arcadia’s president, chief executive officer and director, effective as of September 1, 2019. On August 23, 2019, Arcadia and Mr. Ketkar entered into a Separation and Release Agreement (the “Separation Agreement”) which provides that the vesting of certain options previously issued to Mr. Ketkar will be accelerated pursuant to the terms of the Separation Agreement. In addition, the Separation Agreement extends the post-termination exercise period of the accelerated options from 90 days to up to two years. The stock compensation expense related to the modification of Mr. Ketkar’s stock options was $438,000 and recognized during the third quarter of 2019.

The fair value of stock option awards to employees, executives, directors, and other service providers was estimated at the date of grant using the Black-Scholes Model with the following weighted-average assumption. There were 186,571 and 287,577 options granted during the nine months ended September 30, 2019 and 2018, respectively.

	Three Months Ended September 30,				Nine Months Ended September 30,
		2019		2018		2019		2018
Expected term (years)		6.24		5.52		7.13		5.97
Expected volatility	99%		100%		99%		99%
Risk-free interest rate	1.84%		2.96%		2.05%		2.95%
Dividend yield		—		—		—		—

Employee Stock Purchase Plan

The Company’s 2015 Employee Stock Purchase Plan (“ESPP”) became effective on May 14, 2015. The ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount of up to 15% of their eligible compensation through payroll deductions, subject to any plan limitations. The ESPP provides for six-month offering periods, and at the end of each offering period, employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the last trading day of the offering period. As of September 30, 2019, the number of shares of common stock reserved for future issuance under the ESPP is 102,828. The ESPP provides for automatic annual increases in the shares available for purchase on January 1 of each year. As of September 30, 2019, 15,389 shares had been issued under the ESPP. The Company recorded $4,300, $4,000, $12,400 and $6,000 of compensation expense for the three and nine months ended September 30, 2019 and 2018, respectively.

Warrants

As of September 2019, the Company has 4,170,651 common stock warrants outstanding with a weighted average exercise price of $9.18. The expiration of the warrants ranges from March 2023 to March 2025.

On December 2013, the Company issued warrants to Mahyco International to purchase 3,784 shares of common stock, exercisable as of the issuance date, at an exercise price of $330.40 per share. These warrants expired on December 11, 2018.

In connection with the Series D preferred stock financing in the first half of 2014, the Company issued warrants, exercisable as of the issuance date, to the Series D preferred stock investors to purchase an aggregate of 61,397 shares of common stock at an exercise price of $363.20 per share and to the placement agents to purchase 1,674 shares of common stock at $268.80. Of the 63,071 warrants issued, 1,759 expired on March 28, 2019 and the remaining 61,312 expired in the second quarter of 2019.

As of September 2019, 1,297,870 common stock warrants are outstanding that were issued in the March 2018 Private Placement. Of the total, 1,282,832 shares have a purchase price of $10.7258 and the remaining 15,038 common stock warrants have an exercise price of $41.5625. See Note 9.

As of September 2019, 1,461,962 common stock warrants are outstanding in accordance with the June 2018 Offering. Of the total, 1,392,345 shares have a purchase price of $9.94 and the remaining 69,617 common stock warrants have an exercise price of $12.568. See Note 9.

In connection with a professional services agreement with a non-affiliated third party, executed in April 2019, the Company issued 45,154 warrants (“Service Warrants”) at an exercise price of $6.18. The Service Warrants vest ratably over 12 months and expire in five years from the date of issuance. The Service Warrants are cancelable immediately prior to a change of control subsequent to the termination/expiration of the advisory agreement. The Company also issued 100,000 performance-based warrants (“Performance Warrants”) at an exercise price of $6.18 and vest in 1/6 increments upon the achievement of a qualifying milestone as defined within the agreement. The Performance Warrants expire in five years from the date of issuance and are cancelable immediately prior to a change of control subsequent to the sixth month anniversary of the termination/expiration of the advisory agreement.

The Service and Performance Warrants were determined to be equity instruments. The Service and Performance Warrants were measured on the grant date using the Black Scholes Model with the following assumptions: volatility of 112.5 percent, stock price of $6.18 and risk-free rate of 2.37%. At the grant date, the fair value of the Service and Performance Warrants were $224,000 and $497,000, respectively. Compensation expense associated with the Service Warrants is recognized ratably over the service period (i.e. one-year term). A performance acceleration event was deemed to have been achieved in August 2019, triggering the full vesting of the Performance Warrants. The Company recognized a portion of the Performance Warrants’ compensation expense during the third quarter totaling $228,000 as a cumulative adjustment for the period during which services have already been provided. The remaining Performance Warrants expense will be recognized ratably over the remaining service period. For the Service Warrants, $56,000 and $100,000 of stock compensation was recognized during the three and nine months ending September 2019, respectively.

In June 2019, concurrent with the June 2019 Offering and pursuant to the June 2019 Purchase Agreement, the Company commenced a private placement whereby it issued and sold warrants (“June 2019 Warrants”) exercisable for an aggregate of 1,489,575 shares of common stock, which represents 100% of the shares of common stock sold in the June 2019 Offering, with a purchase price of $0.125 per underlying warrant share and with an exercise price of $5.00 per share (the “June 2019 Private Placement”). The June 2019 Warrants are exercisable upon issuance and will expire five and a half years from the date of issuance. In August and September 2019, investors exercised a portion of the June 2019 Warrants and purchased 1,053,745 shares of common stock, generating cash proceeds of $5.3 million. The Company also issued warrants to the placement agents to purchase a total of 74,479 shares of common stock with an exercise price equal to $6.2938. The placement agent warrants are exercisable upon issuance and will expire five years from the date of issuance. As of September 2019, the investors and placement agent hold outstanding warrants to purchase 510,309 shares of common stock warrants issued pursuant to the June 2019 Offering. See Note 9.

In July 2019, the Company issued warrants to purchase 10,000 shares of common stock to an independent contractor at an exercise price of $2.19 and in August 2019, the Company issued warrants to purchase 20,000 shares of common stock to two affiliated third-parties at an exercise price of $1.92. These warrants were determined to be equity instruments and were measured on the grant date using the Black Scholes Model. The warrants issued in July vest ratably over 12 months and expire two years from the date of issuance. As such, compensation expense associated with these warrants is recognized ratably over the two-year service period. The August warrants vested on the issuance date of August 5, 2019 and expire two years from the date of issuance. As such, compensation expense associated with the warrants was recognized as vested on the issuance date. Stock compensation expense of $1,000 and $23,000 was recognized in the third quarter of 2019 for warrants issued in July and August 2019, respectively.

In September 2019, concurrent with the September 2019 Offering and pursuant to the September 2019 Purchase Agreement, the Company commenced a private placement whereby it issued and sold warrants (“September 2019 Warrants”) exercisable for an aggregate of 659,414 shares of common stock, which represents 50% of the shares of common stock sold in the September 2019 Offering, with a purchase price of $0.125 per underlying warrant share and with an exercise price of $7.52 per share (the “September 2019 Private Placement”). The September 2019 Warrants are exercisable upon issuance and will expire five and a half years from the date of issuance. The Company also issued warrants to the placement agents to purchase a total of 65,942 shares of common stock with an exercise price equal to $9.4781. The placement agent warrants are exercisable upon issuance and will expire five years from the date of issuance. As of September 2019, all 725,356 common stock warrants are outstanding that were issued with the September 2019 Offering. See Note 9.

Income Taxes

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

11. Income Taxes

Income tax expense during interim periods is based on applying an estimated annual effective income tax rate to year-to-date income, plus any significant unusual or infrequently occurring items that are recorded in the interim period. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the expected operating income for the year, projections of the proportion of income earned and taxed in various jurisdictions, permanent and temporary differences, and the likelihood of recovering deferred tax assets generated in the current year. The accounting estimates used to compute the provision for income taxes may change as new events occur, more experience is obtained, additional information becomes known, or as the tax environment changes.

The interim financial statement provision for income taxes expense is different from the amounts computed by applying the United States federal statutory income tax rate of 21%. The Company’s effective tax rate was 0.0% and -0.1% for the three and nine months ended September 30, 2019 and 0.1% and -0.2% for the three and nine months ended September 30, 2018. The difference between the effective tax rate and the federal statutory rate of 21% was primarily due to the full valuation allowance recorded on the Company’s net deferred tax assets and foreign withholding taxes.

The Company may have experienced an ownership change under IRC Section 382 as a result of the common shares issued in connection with the March 2018 Private Placement or in the June 2018 Offering, June 2019 Offering or the September 2019 Offering. Such an ownership change may limit the Company’s ability to utilize its net operating loss carryforwards prior to expiration. Given the full valuation allowance, such a limitation would not impact the deferred tax asset balance as currently recorded.

As of September 30, 2019, there have been no material changes to the Company’s uncertain tax positions.

Net Loss per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Net Loss per Share

13. Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period and excludes any dilutive effects of stock-based awards and warrants. Diluted net loss per share is computed giving effect to all potentially dilutive common shares, including common stock issuable upon exercise of stock options and warrants. For the three and nine months ended September 30, 2019, all potentially dilutive common shares were determined to be anti-dilutive after evaluation.

Securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in shares):

	For the three and nine months ended September 30,
		2019	2018
Options to purchase common stock		691,001	525,194
Warrants to purchase common stock		4,170,651	2,826,687
Total		4,861,652	3,351,881

Description of Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Organization	Organization Arcadia Biosciences, Inc. (the “Company”) was incorporated in Arizona in 2002 and maintains its headquarters in Davis, California, with additional facilities in Phoenix, Arizona, American Falls, Idaho, and Molokai, Hawaii. The Company was reincorporated in Delaware in March 2015. We develop and market high-value food ingredients and nutritional oils that help meet consumer demand for a healthier diet. We aim to create value across the agricultural production and supply chain beginning with enhanced crop productivity for farmers and ultimately delivering accelerated innovation in nutritional quality consumer foods. We use state of the art gene-editing technology and advanced breeding techniques to naturally enhance the nutritional quality of grains and oilseeds to address the rapidly evolving trends in consumer health and nutrition. In addition, we have developed high value crop productivity traits designed to enhance farm economics and have expanded to optimize and standardize the cannabis plant’s content, quality, resiliency and yield. In February 2012, the Company formed Verdeca LLC (“Verdeca,” see Note 5), which is jointly owned with Bioceres Crop Solutions Corp. (“Bioceres”), a U.S. wholly owned subsidiary of Bioceres, S.A., an Argentine corporation. Bioceres, S.A. is an agricultural investment and development cooperative. Verdeca, which is consolidated by the Company, was formed to develop and deregulate soybean varieties using both partners’ agricultural technologies. On August 9, 2019, the Company entered into a joint venture agreement with Legacy Ventures Hawaii, LLC (“Legacy,” see Note 6) to grow, extract, and sell hemp products. The new partnership, Archipelago Ventures Hawaii, LLC (“Archipelago”), combines the Company’s extensive genetic expertise and resources with Legacy’s experience in hemp extraction and sales.
Reverse Stock Split	Reverse Stock Split In January 2018, the Company’s board of directors and its shareholders approved a reverse split of 1:20 on the Company’s issued and outstanding common stock which became effective on January 23, 2018. All issued and outstanding common stock, options to purchase common stock and per share amounts contained in the condensed consolidated financial statements have been retroactively adjusted to reflect the reverse stock split for all periods presented. The reverse stock split did not change the total number of authorized shares of common stock which remained at one hundred and fifty million shares.
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial statements and are in the form prescribed by the Securities and Exchange Commission (the “SEC”) in instructions to Form 10-Q and Rule 10-01 of Regulation S-X. In the opinion of management, the accompanying condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the periods indicated. All material intercompany accounts and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company, the Company’s subsidiary and joint venture, Archipelago, in which the Company has a controlling interest. The Company uses a qualitative approach in assessing the consolidation requirement for variable interest entities (“VIEs”). This approach focuses on determining whether the Company has the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether the Company has the obligation to absorb losses, or the right to receive benefits, that could potentially be significant to the VIE. For all periods presented, the Company has determined that it is the primary beneficiary of Verdeca, which is a VIE. The Company evaluates its relationships with the VIEs upon the occurrence of certain significant events that affect the design, structure or other factors pertinent to the primary beneficiary determination. Interim results are not necessarily indicative of results for any other interim period or for the full fiscal year. For all periods presented, the Company has determined that it has a controlling interest in Archipelago. The Company has determined that it is the primary beneficiary of the joint venture. Accordingly, the Company consolidates the entity in the condensed consolidated financial statements after eliminating intercompany transactions. For consolidated joint ventures, the non-controlling partner’s share of the assets, liabilities and operations of the joint venture is included in non-controlling interests as equity of the Company. The non-controlling partner’s interest is generally computed as the joint venture partner’s ownership percentage of Archipelago. The information included in these condensed consolidated financial statements and notes thereto should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations included herein and Management’s Discussion and Analysis of Financial Condition and Results of Operations and the condensed consolidated financial statements and notes thereto for the fiscal year ended December 31, 2018 included in the Company’s Annual Report on Form 10-K, filed with the SEC on April 1, 2019.
Liquidity, Capital Resources, and Going Concern	Liquidity and Capital Resources As of September 30, 2019, the Company had an accumulated deficit of $200.9 million, cash and cash equivalents of $20.5 million and short-term investments of $10.4 million. For the nine months ended September 30, 2019 and the twelve months ended December 31, 2018, the Company had net losses of $22.6 and $13.5 million, and net cash used in operations of $12.2 million and $13.6 million, respectively. With cash and cash equivalents of $20.5 million and short-term investments of $10.4 million as of September 30, 2019, the Company believes that it currently has sufficient cash to fund its operations for at least the look forward period of 12 months from the issuance of these condensed consolidated financial statements. The Company’s ability to continue as a going concern is dependent on its future ability to generate profitable operations and its ability to obtain additional debt or equity financing, as necessary. The Company may seek to raise additional funds through debt or equity financings. The Company may also consider entering into additional partner arrangements. The sale of additional equity would result in dilution to the Company’s stockholders. The incurrence of debt would result in debt service obligations, and the instruments governing such debt could provide for additional operating and financing covenants that could restrict operations. If the Company does require additional funds and is unable to secure adequate additional funding at terms agreeable to the Company, the Company may be forced to reduce spending, extend payment terms with suppliers, liquidate assets, or suspend or curtail planned development programs or operations. Any of these actions could materially harm the business, results of operations and financial condition.

Inventory (Tables)

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consist of the following (in thousands):

	September 30, 2019		December 31, 2018
Raw materials	$	41	$	41
Goods in process		479		—
Finished goods		1,818		886
Inventories	$	2,338	$	927

Investments and Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Investments And Fair Value Of Financial Instruments [Abstract]

Summary of Amortized Cost and Fair Value of the Available-For-Sale Investment Securities Portfolio

(Dollars in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value
September 30, 2019
Cash equivalents:
Money market funds	$	16,188	$	—	$	—	$	16,188
Corporate securities		1,200		—		—		1,200
Commercial paper		2,246		—		—		2,246
Short-term investments:
Corporate securities		2,650		—		—		2,650
Treasury bills		1,488		—		—		1,488
Commercial paper		6,217		—		—		6,217
Total Assets at Fair Value	$	29,989	$	—	$	—	$	29,989

(Dollars in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value
December 31, 2018
Cash equivalents:
Money market funds	$	9,902	$	—	$	—	$	9,902
Commercial paper		1,345		—		—		1,345
Short-term investments:
Corporate Securities		656		—		—		656
Treasury Bills		1,195		—		—		1,195
Commercial paper		6,776		—		—		6,776
U.S. government securities		1,198		—		—		1,198
Total Assets at Fair Value	$	21,072	$	—	$	—	$	21,072

Summary of Fair Value of Financial Assets

The following table sets forth the fair value of the Company’s financial assets as of September 30, 2019 and December 31, 2018:

	Fair Value Measurements at September 30, 2019
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets at Fair Value
Cash equivalents:
Money market funds	$	16,188	$	—	$	—	$	16,188
Corporate securities		—		1,200		—		1,200
Commercial paper		—		2,246		—		2,246
Short-term investments:
Corporate securities		—		2,650		—		2,650
Treasury bills		1,488		—		—		1,488
Commercial paper		—		6,217		—		6,217
Total Assets at Fair Value	$	17,676	$	12,313	$	—	$	29,989

	Fair Value Measurements at December 31, 2018
(Dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets at Fair Value
Cash equivalents:
Money market funds	$	9,902	$	—	$	—	$	9,902
Commercial paper		—		1,345		—		1,345
Short-term investments:
Corporate Securities		—		656		—		656
Treasury Bills		1,195		—		—		1,195
Commercial paper		—		6,776		—		6,776
U.S. government securities		1,198		—		—		1,198
Total Assets at Fair Value	$	12,295	$	8,777	$	—	$	21,072

Summary of Changes in Fair Value of Liabilities

The following table sets forth the establishment of these liabilities, as well as a summary of the changes in the fair value (in thousands):

	(Level 3)
(Dollars in thousands)	Common Stock Warrant Liability - March 2018 Purchase Agreement		Common Stock Warrant Liability - June 2018 Offering		Common Stock Warrant Liability - June 2019 Offering			Common Stock Warrant Liability - September 2019 Offering			Total
Balance as of December 31, 2018	$	2,354	$	2,729	$	—		$	—		$	5,083
Common stock and warrants issued in conjunction with June 2019 Offering		—		—		4,198			—			4,198
Common stock and warrants issued in conjunction with September 2019 Offering		—		—		—			3,428			3,428
Change in fair value		1,481		1,810		4,491			(992	)		6,790
Exercise of warrants		—		—		(7,016	)		—			(7,016	)
Balance as of September 30, 2019	$	3,835	$	4,539	$	1,673		$	2,436		$	12,483

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

Leases (Tables)

9 Months Ended

Sep. 30, 2019

Lessee Disclosure [Abstract]

Schedule of Leases

Leases consisted of the following (in thousands):

Leases	Classification	September 30, 2019		June 30, 2019		March 31, 2019
Assets
Operating lease assets	Right of use asset	$	1,911	$	2,051	$	2,193
Total leased assets		$	1,911	$	2,051	$	2,193
Liabilities
Current - Operating	Operating lease liability- current	$	609	$	594	$	574
Noncurrent - Operating	Operating lease liability- noncurrent		1,450		1,609		1,771
Total leased liabilities		$	2,059	$	2,203	$	2,345

Lease Cost	Classification	For the Nine Months Ended September 30, 2019			For the Three Months Ended September 30, 2019
Operating lease cost	SG&A and R&D Expenses	$	529		$	177
Short term lease cost(1)	R&D Expenses		138			45
Sublease income(2)	SG&A and R&D Expenses		(40	)		(13	)
Net lease cost		$	627		$	209

(1)	Short term lease cost consists of field trial lease agreements with a lease term of 12 months or less.

(2)	Sublease income is recorded as a credit to lease expense.

Lease Term and Discount Rate

September 30, 2019

June 30, 2019

March 31, 2019

Weighted-average remaining

lease term (years)

2.2

2.4

2.6

Weighted-average discount rate

Stock-Based Compensation and Warrants (Tables)

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity Under Stock Incentive Plans

A summary of activity under the stock incentive plans is as follows (in thousands, except share data and price per share):

	Shares Subject to Outstanding Options			Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding — Balance at December 31, 2018		530,044		$	35.53	$	—
Options granted		186,571			5.16
Options exercised		(546	)		4.63
Options forfeited		(20,718	)		46.09
Options expired		(4,350	)		7.07
Outstanding — Balance at September 30, 2019		691,001		$	27.18	$	24
Vested and expected to vest — September 30, 2019		683,076		$	27.38	$	24
Exercisable —September 30, 2019		426,175		$	37.82	$	17

Weighted-Average Fair Value Assumption of Stock Option Awards

	Three Months Ended September 30,				Nine Months Ended September 30,
		2019		2018		2019		2018
Expected term (years)		6.24		5.52		7.13		5.97
Expected volatility	99%		100%		99%		99%
Risk-free interest rate	1.84%		2.96%		2.05%		2.95%
Dividend yield		—		—		—		—

Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of Securities Not Included in Diluted per Share Calculations

Securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in shares):

	For the three and nine months ended September 30,
		2019	2018
Options to purchase common stock		691,001	525,194
Warrants to purchase common stock		4,170,651	2,826,687
Total		4,861,652	3,351,881

Description of Business and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Accounting Policies [Abstract]
Year of incorporation			2002
Place of reincorporation			Delaware
Date of reincorporation			2015-03
Reverse split of issued and outstanding common stock			1:20
Accumulated deficit	$ (200,928)		$ (200,928)		$ (178,366)
Cash and cash equivalents	20,541		20,541		11,998
Short-term investments	10,355		10,355		9,825
Net losses	$ (14,187)	$ 4,450	(22,562)	$ (12,834)	(13,500)
Net cash used in operations			$ (12,186)	$ (10,936)	$ (13,600)

Investments and Fair Value of Financial Instruments - Summary of Amortized Cost and Fair Value of the Available-For-Sale Investment Securities Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 29,989	$ 21,072
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	29,989	21,072
Cash Equivalents [Member] \| Money Market Funds [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	16,188	9,902
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	16,188	9,902
Cash Equivalents [Member] \| Commercial Paper [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	2,246	1,345
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	2,246	1,345
Cash Equivalents [Member] \| Corporate Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,200
Unrealized Gains	0
Unrealized Losses	0
Estimated Fair Value	1,200
Short-term Investments [Member] \| Commercial Paper [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,217	6,776
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	6,217	6,776
Short-term Investments [Member] \| Treasury Bills [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,488	1,195
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	1,488	1,195
Short-term Investments [Member] \| Corporate Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	2,650	656
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	$ 2,650	656
Short-term Investments [Member] \| U.S. Government Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		1,198
Unrealized Gains		0
Unrealized Losses		0
Estimated Fair Value		$ 1,198

Investments and Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	1 Months Ended
	Sep. 30, 2019	Aug. 31, 2019	Sep. 10, 2019	Jun. 14, 2019	Dec. 31, 2018	Jun. 14, 2018	Mar. 22, 2018
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investment in continuous unrealized loss position for more than three months	$ 0
Unrealized gains and losses included in accumulated other comprehensive income or loss	0				$ 0
Other-than-temporary impairments associated with credit losses required to be recognized	$ 0
Common Stock Warrant Liability [Member] \| Securities Purchase Agreement [Member] \| Level 3 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Shares of common stock issued	435,830						1,282,832
Common Stock Warrant Liability [Member] \| Securities Purchase Agreement [Member] \| Level 3 [Member] \| June 2018 Offering [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Shares of common stock issued						1,392,345
Common Stock Warrant Liability [Member] \| Securities Purchase Agreement [Member] \| Level 3 [Member] \| June 2019 Offering [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Shares of common stock issued				1,489,575
Investors exercised warrants	1,053,745	1,053,745
Common Stock Warrant Liability [Member] \| Securities Purchase Agreement [Member] \| Level 3 [Member] \| September 2019 Offering [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Shares of common stock issued			659,414

Investments and Fair Value of Financial Instruments - Summary of Fair Value of Financial Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets at Fair Value
Total Assets at Fair Value	$ 29,989	$ 21,072
Money Market Funds [Member]
Assets at Fair Value
Cash equivalents	16,188	9,902
Commercial Paper [Member]
Assets at Fair Value
Cash equivalents	2,246	1,345
Short-term investments	6,217	6,776
Treasury Bills [Member]
Assets at Fair Value
Short-term investments	1,488
U.S. Government Securities [Member]
Assets at Fair Value
Short-term investments		1,198
Corporate Securities [Member]
Assets at Fair Value
Cash equivalents	1,200
Short-term investments	2,650	656
Treasury Bills [Member]
Assets at Fair Value
Short-term investments		1,195
Level 1 [Member]
Assets at Fair Value
Total Assets at Fair Value	17,676	12,295
Level 1 [Member] \| Money Market Funds [Member]
Assets at Fair Value
Cash equivalents	16,188	9,902
Level 1 [Member] \| Commercial Paper [Member]
Assets at Fair Value
Cash equivalents	0	0
Short-term investments	0	0
Level 1 [Member] \| Treasury Bills [Member]
Assets at Fair Value
Short-term investments	1,488
Level 1 [Member] \| U.S. Government Securities [Member]
Assets at Fair Value
Short-term investments		1,198
Level 1 [Member] \| Corporate Securities [Member]
Assets at Fair Value
Cash equivalents	0
Short-term investments	0	0
Level 1 [Member] \| Treasury Bills [Member]
Assets at Fair Value
Short-term investments		1,195
Level 2 [Member]
Assets at Fair Value
Total Assets at Fair Value	12,313	8,777
Level 2 [Member] \| Money Market Funds [Member]
Assets at Fair Value
Cash equivalents	0	0
Level 2 [Member] \| Commercial Paper [Member]
Assets at Fair Value
Cash equivalents	2,246	1,345
Short-term investments	6,217	6,776
Level 2 [Member] \| Treasury Bills [Member]
Assets at Fair Value
Short-term investments	0
Level 2 [Member] \| U.S. Government Securities [Member]
Assets at Fair Value
Short-term investments		0
Level 2 [Member] \| Corporate Securities [Member]
Assets at Fair Value
Cash equivalents	1,200
Short-term investments	2,650	656
Level 2 [Member] \| Treasury Bills [Member]
Assets at Fair Value
Short-term investments		0
Level 3 [Member]
Assets at Fair Value
Total Assets at Fair Value	0	0
Level 3 [Member] \| Money Market Funds [Member]
Assets at Fair Value
Cash equivalents	0	0
Level 3 [Member] \| Commercial Paper [Member]
Assets at Fair Value
Cash equivalents	0	0
Short-term investments	0	0
Level 3 [Member] \| Treasury Bills [Member]
Assets at Fair Value
Short-term investments	0
Level 3 [Member] \| U.S. Government Securities [Member]
Assets at Fair Value
Short-term investments		0
Level 3 [Member] \| Corporate Securities [Member]
Assets at Fair Value
Cash equivalents	0
Short-term investments	$ 0	0
Level 3 [Member] \| Treasury Bills [Member]
Assets at Fair Value
Short-term investments		$ 0

Investments and Fair Value of Financial Instruments - Summary of Changes in Fair Value of Liabilities (Detail) - Level 3 [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance as of December 31, 2018	$ 5,083
Change in fair value	6,790
Exercise of warrants	(7,016)
Balance as of September 30, 2019	12,483
Common Stock Warrant Liability [Member] \| Purchase Agreement [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance as of December 31, 2018	2,354
Common stock and warrants issued	0
Change in fair value	1,481
Exercise of warrants	0
Balance as of September 30, 2019	3,835
Common Stock Warrant Liability [Member] \| June 2018 Offering [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance as of December 31, 2018	2,729
Common stock and warrants issued	0
Change in fair value	1,810
Exercise of warrants	0
Balance as of September 30, 2019	4,539
Common Stock Warrant Liability [Member] \| June 2019 Offering [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance as of December 31, 2018	0
Common stock and warrants issued	4,198
Change in fair value	4,491
Exercise of warrants	(7,016)
Balance as of September 30, 2019	1,673
Common Stock Warrant Liability [Member] \| September 2019 Offering [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance as of December 31, 2018	0
Common stock and warrants issued	3,428
Change in fair value	(992)
Exercise of warrants	0
Balance as of September 30, 2019	$ 2,436

Consolidated Joint Venture - Additional Information (Detail) - Archipelago Ventures Hawaii, LLC [Member]		3 Months Ended	9 Months Ended
	Aug. 09, 2019 USD ($) Individual	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Other Income [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method investment, income or loss recorded		$ 0	$ 0
Arcadia Biosciences, Inc [Member]
Schedule Of Equity Method Investments [Line Items]
Number of individuals appointed \| Individual	2
Joint venture interest percentage	50.75%
Capital contributions	$ 709,000
Legacy Ventures Hawaii, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Number of individuals appointed \| Individual	2
Joint venture interest percentage	49.25%
Capital contributions	$ 689,000

Leases - Additional Information (Detail)	9 Months Ended
Leases - Additional Information (Detail)	Sep. 30, 2019
Lessee Lease Description [Line Items]
Existence of option to extend	true
Lease option to extend, description	Some leases (the warehouse, greenhouse and a copy machine) include one or more options to renew, with renewal terms that can extend the lease term from one to six years.
Minimum [Member]
Lessee Lease Description [Line Items]
Option to extend lease, term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Option to extend lease, term	6 years

Leases - Schedule of Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Assets
Operating lease assets	$ 1,911	$ 1,911	$ 2,051	$ 2,193
Total leased assets	1,911	1,911	2,051	2,193
Liabilities
Current - Operating	609	609	594	574
Noncurrent - Operating	1,450	1,450	1,609	1,771
Total leased liabilities	2,059	2,059	$ 2,203	$ 2,345
Lease Cost
Net lease cost	$ 209	$ 627
Lease Term and Discount Rate
Weighted-average remaining lease term (years)	2 years 2 months 12 days	2 years 2 months 12 days	2 years 4 months 24 days	2 years 7 months 6 days
Weighted-average discount rate	7.00%	7.00%	7.00%	7.00%
SG&A and R&D Expenses [Member]
Lease Cost
Operating lease cost	$ 177	$ 529
Sublease income	(13)	(40)
R&D Expenses [Member]
Lease Cost
Short term lease cost	$ 45	$ 138

Private Placement and Registered Direct Offering - Additional Information (Detail)						1 Months Ended			3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 05, 2019 USD ($) $ / shares shares	Jun. 12, 2019 USD ($) $ / shares shares	Jun. 11, 2018 USD ($) $ / shares shares	Mar. 22, 2018 $ / shares shares	Mar. 19, 2018	Sep. 30, 2019 USD ($) $ / shares shares	Aug. 31, 2019 USD ($) shares	Jun. 30, 2019 USD ($)	Sep. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	May 07, 2018 USD ($)
Class Of Warrant Or Right [Line Items]
Warrants issued, exercise price \| $ / shares						$ 9.18			$ 9.18						$ 9.18
Proceeds from issuance of private placement															$ 10,000,000
Offering costs						$ 226,000			$ 226,000						$ 226,000
Stock price \| $ / shares						$ 32.52			$ 32.52						$ 32.52
Common stock no par value \| $ / shares
Initial loss recognized on liabilities															$ 4,000,000
Liabilities marked to market value														$ 15,900,000
Additional (loss) income on liabilities														$ (1,900,000)
Offering cost, expense									$ 336,000			$ 1,000			702,000	$ 2,544,000
Issuance of placement agent warrants																	$ 526,000
Fair value of common stock warrants at inception						$ 9,000,000			$ 9,000,000						9,000,000
Cash proceeds															$ 5,269,000
Warrant outstanding \| shares						4,170,651			4,170,651						4,170,651
Warrants [Member]
Class Of Warrant Or Right [Line Items]
Issuance of placement agent warrants															$ 526,000
Placement Agent [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares						15,038			15,038						15,038
Warrants issued, exercise price \| $ / shares						$ 41.5625			$ 41.5625						$ 41.5625
Offering costs						$ 1,800,000			$ 1,800,000						$ 1,800,000
Warrant, exercisable term															5 years
Offering cost, expense															$ 1,800,000
June 2018 Placement Agent Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares						69,617			69,617						69,617
Warrants issued, exercise price \| $ / shares						$ 12.568			$ 12.568						$ 12.568
Offering costs						$ 1,600,000			$ 1,600,000						$ 1,600,000
Aggregate agent fee paid															$ 980,000
Warrant, exercisable term															5 years
Offering cost, expense																	$ 721,000
Issuance of placement agent warrants															$ 427,000
Offering costs portion attributable to common stock						$ 912,000			$ 912,000						$ 912,000
June 2019 Placement Agent Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares						74,479			74,479						74,479
Warrants issued, exercise price \| $ / shares						$ 6.2938			$ 6.2938						$ 6.2938
Offering costs						$ 115,000			$ 115,000						$ 115,000
Aggregate agent fee paid															$ 525,000
Warrant, exercisable term															5 years
Offering cost, expense								$ 375,000	10,000	$ 365,000
Issuance of placement agent warrants															$ 198,000
Offering costs portion attributable to common stock						487,000			487,000						487,000
June 2019 Placement Agent Warrants [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Offering costs						$ 800,000			$ 800,000						$ 800,000
September 2019 Placement Agent Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares						65,942			65,942						65,942
Warrants issued, exercise price \| $ / shares						$ 9.4781			$ 9.4781						$ 9.4781
Offering costs						$ 97,000			$ 97,000						$ 97,000
Aggregate agent fee paid															$ 770,000
Warrant, exercisable term															5 years
Offering cost, expense															$ 326,000
Issuance of placement agent warrants															326,000
Offering costs portion attributable to common stock						796,000			796,000						796,000
September 2019 Placement Agent Warrants [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Offering costs						$ 1,100,000			$ 1,100,000						$ 1,100,000
Measurement Input, Price Volatility [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						1.00			1.00						1.00
Measurement Input, Risk Free Interest Rate [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						0.0263			0.0263						0.0263
Black Scholes Merton Model [Member]
Class Of Warrant Or Right [Line Items]
Stock price \| $ / shares						$ 8.20			$ 8.20						$ 8.20
Black Scholes Merton Model [Member] \| Measurement Input, Price Volatility [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						1.08			1.08						1.08
Black Scholes Merton Model [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						0.0283			0.0283						0.0283
Common Stock Adjustment Feature Liability [Member] \| Monte Carlo Simulation Model [Member]
Class Of Warrant Or Right [Line Items]
Fair value of liabilities						$ 3,800,000			$ 3,800,000						$ 3,800,000
March 2018 Warrant Liability [Member] \| Monte Carlo Simulation Model [Member]
Class Of Warrant Or Right [Line Items]
Fair value of liabilities						10,200,000			10,200,000						10,200,000
June 2018 Warrant Liability [Member]
Class Of Warrant Or Right [Line Items]
Liabilities marked to market value						4,500,000		2,600,000	4,500,000	2,600,000	$ 7,300,000				4,500,000
Additional (loss) income on liabilities									(1,900,000)	4,600,000	(4,500,000)
Proceeds from issuance of common stock															5,000,000
Proceeds from issuance of common stock and warrants gross															14,000,000
June 2019 Warrant Liability [Member]
Class Of Warrant Or Right [Line Items]
Liabilities marked to market value						1,600,000		3,400,000	1,600,000	3,400,000					1,600,000
Additional (loss) income on liabilities									1,200,000	800,000					(6,500,000)
Proceeds from issuance of common stock															3,300,000
Proceeds from issuance of common stock and warrants gross															7,500,000
Fair value of common stock warrants at inception						$ 4,200,000			$ 4,200,000						4,200,000
Investors exercised warrants \| shares						1,053,745	1,053,745
Cash proceeds							$ 5,300,000								5,300,000
Exercised warrants															7,000,000
Unexercised warrants															$ 2,900,000
Warrant outstanding \| shares						435,830			435,830						435,830
June 2019 Warrant Liability [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Liabilities marked to market value						$ 9,900,000			$ 9,900,000						$ 9,900,000
June 2019 Warrant Liability [Member] \| Black Scholes Merton Model [Member]
Class Of Warrant Or Right [Line Items]
Stock price \| $ / shares						$ 3.66			$ 3.66						$ 3.66
June 2019 Warrant Liability [Member] \| Black Scholes Merton Model [Member] \| Measurement Input, Price Volatility [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						1.08			1.08						1.08
June 2019 Warrant Liability [Member] \| Black Scholes Merton Model [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						0.0188			0.0188						0.0188
September 2019 Warrant Liability [Member]
Class Of Warrant Or Right [Line Items]
Liabilities marked to market value						$ 2,400,000			$ 2,400,000						$ 2,400,000
Additional (loss) income on liabilities									1,000,000
Proceeds from issuance of common stock															6,600,000
Proceeds from issuance of common stock and warrants gross															10,000,000
Fair value of common stock warrants at inception						$ 3,400,000			$ 3,400,000						$ 3,400,000
September 2019 Warrant Liability [Member] \| Black Scholes Merton Model [Member]
Class Of Warrant Or Right [Line Items]
Stock price \| $ / shares						$ 6.34			$ 6.34						$ 6.34
September 2019 Warrant Liability [Member] \| Black Scholes Merton Model [Member] \| Measurement Input, Price Volatility [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						1.16			1.16						1.16
September 2019 Warrant Liability [Member] \| Black Scholes Merton Model [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Class Of Warrant Or Right [Line Items]
Volatility rate						0.0160			0.0160						0.0160
March 2018 Securities Purchase Agreement [Member]
Class Of Warrant Or Right [Line Items]
Shares of common stock issued \| shares				1,201,634
Warrant issued, shares of common stock called by warrant \| shares				1,282,832
Warrants issued, exercise price \| $ / shares				$ 10.7258
June 2018 Purchase Agreement [Member]
Class Of Warrant Or Right [Line Items]
Offering costs						$ 1,200,000			$ 1,200,000						$ 1,200,000
Proceeds from issuance of common stock and warrants gross															14,000,000
Proceeds from issuance of common stock and warrants net															12,800,000
Securities Purchase Agreement [Member] \| June 2019 Offering [Member]
Class Of Warrant Or Right [Line Items]
Offering costs						641,000			641,000						641,000
Proceeds from issuance of common stock and warrants gross															7,500,000
Proceeds from issuance of common stock and warrants net															6,900,000
Securities Purchase Agreement [Member] \| September 2019 Offering [Member]
Class Of Warrant Or Right [Line Items]
Offering costs						797,000			797,000						797,000
Proceeds from issuance of common stock and warrants gross															10,000,000
Proceeds from issuance of common stock and warrants net															9,200,000
March 2018 Private Placement [Member]
Class Of Warrant Or Right [Line Items]
Proceeds from issuance of private placement															8,700,000
Proceeds from offering costs of private placement, gross															10,000,000
Offering costs						1,300,000			1,300,000						1,300,000
Liabilities marked to market value																		$ 8,400,000
Additional (loss) income on liabilities													$ (2,400,000)
Reclassification of financing liabilities to stockholders equity													$ 8,400,000
March 2018 Private Placement [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Offering costs						458,000			458,000						458,000
March 2018 Private Placement [Member] \| Placement Agent [Member]
Class Of Warrant Or Right [Line Items]
Aggregate agent fee paid															850,000
March 2018 Private Placement [Member] \| March 2018 Warrant Liability [Member]
Class Of Warrant Or Right [Line Items]
Liabilities marked to market value						$ 3,800,000		$ 2,200,000	3,800,000	2,200,000	6,300,000				3,800,000
Additional (loss) income on liabilities									$ (1,600,000)	$ 4,100,000	$ (4,000,000)
March 2018 Private Placement [Member] \| March 2018 Securities Purchase Agreement [Member]
Class Of Warrant Or Right [Line Items]
Shares of common stock issued \| shares				300,752
Warrant issued, shares of common stock called by warrant \| shares				300,752
Warrants issued, exercise price \| $ / shares				$ 45.75
Warrants expiration period					5 years
June 2018 Offering [Member] \| June 2018 Purchase Agreement [Member]
Class Of Warrant Or Right [Line Items]
Shares of common stock issued \| shares			1,392,345
Stock price \| $ / shares			$ 9.93
Proceeds from issuance of common stock			$ 13,800,000
Offering closing period			Jun. 14, 2018
June 2018 Offering [Member] \| Securities Purchase Agreement [Member]
Class Of Warrant Or Right [Line Items]
Shares of common stock issued \| shares		1,489,575
Stock price \| $ / shares		$ 4.91
Proceeds from issuance of common stock		$ 7,310,000
Offering closing period		Jun. 14, 2019
June 2018 Private Placement [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares			1,392,345
Warrants issued, exercise price \| $ / shares			$ 9.94
Warrants expiration period			5 years 6 months
Proceeds from offering costs of private placement, gross			$ 174,000
Class of warrant or right number of securities called by warrants or rights, per share \| $ / shares			$ 0.125
June 2019 Private Placement [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares		1,489,575
Warrants issued, exercise price \| $ / shares		$ 5.00
Warrants expiration period		5 years 6 months
Proceeds from offering costs of private placement, gross		$ 186,000
Class of warrant or right number of securities called by warrants or rights, per share \| $ / shares		$ 0.125
September 2019 Offering [Member]
Class Of Warrant Or Right [Line Items]
Issuance of placement agent warrants															$ 326,000
September 2019 Offering [Member] \| Securities Purchase Agreement [Member]
Class Of Warrant Or Right [Line Items]
Shares of common stock issued \| shares	1,318,828
Stock price \| $ / shares	$ 7.52
Proceeds from issuance of common stock	$ 9,920,000
Offering closing period	Sep. 10, 2019
September 2019 Purchase Agreement [Member] \| Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrant issued, shares of common stock called by warrant \| shares	659,414
Warrants issued, exercise price \| $ / shares	$ 7.52
Warrants expiration period	5 years 6 months
Proceeds from offering costs of private placement, gross	$ 82,000
Class of warrant or right number of securities called by warrants or rights, per share \| $ / shares	$ 0.125

Stock-Based Compensation and Warrants - Additional Information (Detail)						1 Months Ended						2 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended
	Aug. 23, 2019	Aug. 22, 2019	Mar. 28, 2019 shares	May 20, 2015 shares	May 14, 2015	Sep. 30, 2019 USD ($) $ / shares shares	Aug. 31, 2019 $ / shares shares	Jul. 31, 2019 $ / shares shares	Jun. 30, 2019 $ / shares shares	Apr. 30, 2019 USD ($) $ / shares shares	Dec. 31, 2013 $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2019 $ / shares shares	Sep. 30, 2018 USD ($)	Jun. 30, 2019 $ / shares shares	Sep. 30, 2019 USD ($) IncentivePlan $ / shares shares	Sep. 30, 2018 USD ($) shares	Dec. 31, 2018 shares	Jun. 30, 2014 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans \| IncentivePlan																	2
Total number of options outstanding						691,001						691,001	691,001				691,001		530,044
Unrecognized compensation cost related to unvested stock-based compensation grants \| $						$ 1,200,000						$ 1,200,000	$ 1,200,000				$ 1,200,000
Weighted-average remaining recognition period																	1 year 9 months 18 days
Stock-based compensation \| $																	$ 1,870,000	$ 998,000
Options granted																	186,571	287,577
Number of warrant to purchase common stock issued						4,170,651						4,170,651	4,170,651				4,170,651
Warrants issued, exercise price \| $ / shares						$ 9.18						$ 9.18	$ 9.18				$ 9.18
Stock price \| $ / shares						32.52						32.52	32.52				$ 32.52
Cash proceeds \| $																	$ 5,269,000
Black Scholes Merton Model [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price \| $ / shares						$ 8.20						$ 8.20	$ 8.20				$ 8.20
Service Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares										$ 6.18
Warrant issued, shares of common stock called by warrant										45,154
Warrants vesting period										12 months
Warrant, exercisable term										5 years
Fair value of Warrants \| $										$ 224,000
Compensation expense associated with Warrants, term																1 year
Compensation expense associated with Warrants \| $													$ 56,000				$ 100,000
Performance Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares										$ 6.18
Warrant issued, shares of common stock called by warrant										100,000
Warrant, exercisable term										5 years
Fair value of Warrants \| $										$ 497,000
Cumulative adjustment compensation expense associated with warrants \| $													$ 228,000
Service and Performance Warrants [Member] \| Black Scholes Merton Model [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price \| $ / shares										$ 6.18
Service and Performance Warrants [Member] \| Black Scholes Merton Model [Member] \| Volatility [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants, measurement input										1.125
Service and Performance Warrants [Member] \| Black Scholes Merton Model [Member] \| Risk-Free Rate [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants, measurement input										0.0237
Series D Redeemable Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant issued, shares of common stock called by warrant																				63,071
Number of warrants expired			1,759											61,312
Series D Redeemable Convertible Preferred Stock [Member] \| Placement Agent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares																				$ 268.80
Warrant issued, shares of common stock called by warrant																				1,674
Mahyco International [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares											$ 330.40
Warrant issued, shares of common stock called by warrant											3,784
Warrant, expiration date											Dec. 11, 2018
Investor [Member] \| Series D Redeemable Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares																				$ 363.20
Warrant issued, shares of common stock called by warrant																				61,397
Independent Contractor [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares								$ 2.19
Warrant issued, shares of common stock called by warrant								10,000
Two Affiliated Third Parties [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares							$ 1.92
Warrant issued, shares of common stock called by warrant							20,000
2015 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares reserved for issuance under plan						102,828						102,828	102,828				102,828
Stock-based compensation \| $													$ 4,300		$ 4,000		$ 12,400	$ 6,000
Percentage in payroll deductions to acquire shares of common stock					15.00%
Purchase plan offering period					6 months
Employees are able to purchase company's common stock on first trading day of offering period, percentage					85.00%
Issuance of common stock pursuant to employee stock purchase plan																	15,389
July 2019 Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants vesting period								12 months
Warrant, exercisable term								2 years
Compensation expense associated with Warrants, term								2 years
Compensation expense associated with Warrants \| $													1,000
August 2019 Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant, exercisable term							2 years
Compensation expense associated with Warrants \| $													23,000
Warrants issuance date							Aug. 05, 2019
Separation Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable period	2 years	90 days
Stock-based compensation \| $													$ 438,000
March 2018 Purchase Agreement [Member] \| Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						1,297,870						1,297,870	1,297,870				1,297,870
March 2018 Purchase Agreement [Member] \| Purchase Agreement [Member] \| Purchase Price of $10.7258 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						1,282,832						1,282,832	1,282,832				1,282,832
Warrants issued, purchase price of warrants per share \| $ / shares						$ 10.7258						$ 10.7258	$ 10.7258				$ 10.7258
March 2018 Purchase Agreement [Member] \| Purchase Agreement [Member] \| Exercise Price of $41.5625 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						15,038						15,038	15,038				15,038
Warrants issued, exercise price \| $ / shares						$ 41.5625						$ 41.5625	$ 41.5625				$ 41.5625
June 2018 Offering [Member] \| Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						1,461,962						1,461,962	1,461,962				1,461,962
June 2018 Offering [Member] \| Purchase Agreement [Member] \| Purchase Price of $9.94 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						1,392,345						1,392,345	1,392,345				1,392,345
Warrants issued, purchase price of warrants per share \| $ / shares						$ 9.94						$ 9.94	$ 9.94				$ 9.94
June 2018 Offering [Member] \| Purchase Agreement [Member] \| Exercise Price of $12.568 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						69,617						69,617	69,617				69,617
Warrants issued, exercise price \| $ / shares						$ 12.568						$ 12.568	$ 12.568				$ 12.568
June 2019 Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						510,309						510,309	510,309				510,309
June 2019 Purchase Agreement [Member] \| Placement Agent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares									$ 6.2938					$ 6.2938		$ 6.2938
Warrant issued, shares of common stock called by warrant									74,479					74,479		74,479
Warrant, exercisable term									5 years
June 2019 Purchase Agreement [Member] \| Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares									$ 5.00					$ 5.00		$ 5.00
Warrant issued, shares of common stock called by warrant									1,489,575					1,489,575		1,489,575
Warrants issued, purchase price of warrants per share \| $ / shares									$ 0.125					$ 0.125		$ 0.125
Warrant, exercisable term									5 years 6 months
Class of warrant or right, issued percentage in connection with common stock sold									100.00%
Investors exercised warrants and purchase shares of common stock												1,053,745
Cash proceeds \| $												$ 5,300,000
September 2019 Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrant to purchase common stock issued						725,356						725,356	725,356				725,356
September 2019 Purchase Agreement [Member] \| Placement Agent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares						$ 9.4781						$ 9.4781	$ 9.4781				$ 9.4781
Warrant issued, shares of common stock called by warrant						65,942						65,942	65,942				65,942
Warrant, exercisable term						5 years
September 2019 Purchase Agreement [Member] \| Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants issued, exercise price \| $ / shares						$ 7.52						$ 7.52	$ 7.52				$ 7.52
Warrant issued, shares of common stock called by warrant						659,414						659,414	659,414				659,414
Warrants issued, purchase price of warrants per share \| $ / shares						$ 0.125						$ 0.125	$ 0.125				$ 0.125
Warrant, exercisable term						5 years 6 months
Class of warrant or right, issued percentage in connection with common stock sold						50.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant, expiration date																	2025-03
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant, expiration date																	2023-03
2015 Omnibus Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Terms under the plan																	The 2015 Plan became effective in May 2015 and all shares that were reserved, but not issued, under the 2006 Plan were assumed by the 2015 Plan. Upon effectiveness, the 2015 Plan had 154,387 shares of common stock reserved for future issuance, which included 10,637 shares under the 2006 Plan that were transferred to and assumed by the 2015 Plan. The 2015 Plan provides for automatic annual increases in shares available for grant. In addition, shares subject to awards under the 2006 Plan that are forfeited or canceled will be added to the 2015 Plan.
Total number of shares reserved for issuance under plan				154,387		659,490						659,490	659,490				659,490
Options vesting period				4 years											2 years
Additional shares authorized for issuance under the plan									120,000
Common stock available for future grant						29,568						29,568	29,568				29,568
Total number of options outstanding						629,922						629,922	629,922				629,922
2015 Omnibus Equity Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable period				10 years
2015 Omnibus Equity Incentive Plan [Member] \| Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting percentage at end of one year				25.00%
2006 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares reserved for issuance under plan				10,637
Total number of options outstanding						61,079						61,079	61,079				61,079

Stock-Based Compensation and Warrants - Summary of Activity Under Stock Incentive Plans (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares Subject to Outstanding, Beginning Balance	530,044
Shares Subject to Outstanding, Options granted	186,571	287,577
Shares Subject to Outstanding, Options exercised	(546)
Shares Subject to Outstanding, Options Forfeited	(20,718)
Shares Subject to Outstanding, Options Expired	(4,350)
Shares Subject to Outstanding, Ending Balance	691,001
Shares Subject to Outstanding, Vested and expected to vest	683,076
Shares Subject to Outstanding, Exercisable	426,175
Weighted-Average Exercise Price Per Share, Outstanding Beginning Balance	$ 35.53
Weighted-Average Exercise Price Per Share, Options granted	5.16
Weighted-Average Exercise Price Per Share, Options exercised	4.63
Weighted-Average Exercise Price Per Share, Options forfeited	46.09
Weighted-Average Exercise Price Per Share, Options expired	7.07
Weighted Average Exercise Price Per Share, Outstanding Ending Balance	27.18
Weighted Average Exercise Price Per Share, Vested and expected to vest	27.38
Weighted Average Exercise Price Per Share, Exercisable	$ 37.82
Aggregate Intrinsic Value, Outstanding Balance	$ 24
Aggregate Intrinsic Value, Vested and expected to vest	24
Aggregate Intrinsic Value, Exercisable	$ 17

Stock-Based Compensation and Warrants - Weighted-Average Fair Value Assumption of Stock Option Awards (Detail) - Employee Stock Option [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 years 2 months 26 days	5 years 6 months 7 days	7 years 1 month 17 days	5 years 11 months 19 days
Expected volatility	99.00%	100.00%	99.00%	99.00%
Risk-free interest rate	1.84%	2.96%	2.05%	2.95%

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Federal statutory tax rate			21.00%
Effective tax rate	0.00%	0.10%	(0.10%)	(0.20%)
Uncertain tax positions	$ 0		$ 0

Contingent Liability and Notes Payable - Additional Information (Detail)		3 Months Ended	9 Months Ended
	Dec. 31, 2010 USD ($) Program	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 15, 2005 USD ($)
Contingent Liability And Notes Payable [Line Items]
Notes payable		$ 137,000	$ 137,000
Notes payable interest rate		8.00%	8.00%
Notes payable term		5 years
Notes payable maturity year		2024
Other noncurrent liability		$ 3,000,000	$ 3,000,000	$ 3,072,000
Anawah, Inc [Member]
Contingent Liability And Notes Payable [Line Items]
Contingent liability	$ 3,000,000				$ 5,000,000
Date of merger and reorganization			Jun. 15, 2005
Restructuring activities, description			As of December 31, 2010, the Company ceased activities relating to three of the six Anawah product programs,
Number of development programs ceased \| Program	3
Number of development programs \| Program	6
Other noncurrent liability		$ 3,000,000	$ 3,000,000

Variable Interest Entity - Additional Information (Detail)	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 29, 2012 Owner	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Variable Interest Entity [Line Items]
Direct expenses and allocated overhead amount \| $		$ 340,000	$ 286,000	$ 982,000	$ 799,000
Bioceres, S.A. [Member]
Variable Interest Entity [Line Items]
Number of shareholders owning agricultural investment and development cooperative \| Owner	300

Collaborative Arrangements - Additional Information (Detail)	1 Months Ended
	Aug. 31, 2017
Collaborative Arrangements [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Contractual agreement month and year	2017-08

Related-Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Royalty fees due	$ 28	$ 29
John Sperling Foundation [Member]
Related Party Transaction [Line Items]
Royalty fees due	$ 28	$ 29

Inventory - Summary of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 41	$ 41
Goods in process	479
Finished goods	1,818	886
Inventories	$ 2,338	$ 927