Gevo (GEVO) 10-Q 13 May 20 2020 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2020	Apr. 30, 2020
Document Information [Line Items]
Entity Registrant Name	Gevo, Inc.
Entity Central Index Key	0001392380
Trading Symbol	gevo
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		14,883,077
Entity Shell Company	false
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Title of 12(b) Security	Common Stock, par value $0.01 per share

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents		$ 9,289	$ 16,302
Accounts receivable		152	1,135
Inventories		2,680	3,201
Prepaid expenses and other current assets		3,838	3,590
Total current assets		15,959	24,228
Property, plant and equipment, net		65,855	66,696
Investment in Juhl		1,500	1,500
Deposits and other assets		848	935
Total assets	[1]	84,162	93,359
Current liabilities:
Accounts payable and accrued liabilities		4,477	5,678
Notes (current), net		14,050	13,900
2020/21 Notes embedded derivative liability		100
Loans payable - other (current)		375	516
Total current liabilities		19,002	20,094
Loans payable - other (long-term)		232	233
Other long-term liabilities		435	528
Total liabilities		19,669	20,855
Commitments and Contingencies (see Note 11)
Stockholders' Equity
Common stock, $0.01 par value per share; 250,000,000 authorized; 14,614,890 and 14,083,232 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively.		145	141
Additional paid-in capital		531,587	530,349
Accumulated deficit		(467,239)	(457,986)
Total stockholders' equity		64,493	72,504
Total liabilities and stockholders' equity		$ 84,162	$ 93,359
[1]	All other significant non-cash items relate to the activities of Gevo.

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock shares issued (in shares)	14,614,890	14,083,232
Common stock, shares outstanding (in shares)	14,614,890	14,083,232

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue and cost of goods sold
Revenue from contract with Customer	$ 3,825	$ 6,403
Total revenues	3,825	6,403
Cost of goods sold	8,139	8,961
Gross loss	(4,314)	(2,558)
Operating expenses
Research and development expense	580	978
Selling, general and administrative expense	2,783	2,092
Restructuring expenses	299
Total operating expenses	3,662	3,070
Loss from operations	(7,976)	(5,628)
Other income (expense)
Interest expense	(545)	(755)
(Loss) on modification of 2020 Notes	(669)
Gain from change in fair value of derivative warrant liability	7	1
(Loss) gain from change in fair value of 2020/21 Notes and 2020 Notes embedded derivative liability	(100)	246
Other income	30
Total other income (expense), net	(1,277)	(508)
Net loss	$ (9,253)	$ (6,136)
Net loss per share - basic and diluted (in dollars per share)	$ (0.64)	$ (0.60)
Weighted-average number of common shares outstanding - basic and diluted (in shares)	14,472,798	10,153,873
Ethanol Sales and Related Products [Member]
Revenue and cost of goods sold
Revenue from contract with Customer	$ 3,700	$ 5,664
Total revenues	3,700	5,664
Hydrocarbon [Member]
Revenue and cost of goods sold
Revenue from contract with Customer	125	739
Total revenues	$ 125	$ 739

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018	8,640,583
Balance at Dec. 31, 2018	$ 86	$ 518,027	$ (429,326)	$ 88,787
Issuance of common stock, net of issue costs (in shares)	3,244,941
Issuance of common stock, net of issue costs	$ 33	9,611		9,644
Non-cash stock-based compensation		234		234
Net loss			(6,136)	(6,136)
Balance (in shares) at Mar. 31, 2019	11,885,524
Balance at Mar. 31, 2019	$ 119	527,872	(435,462)	92,529
Balance (in shares) at Dec. 31, 2019	14,083,232
Balance at Dec. 31, 2019	$ 141	530,349	(457,986)	72,504
Issuance of common stock, net of issue costs (in shares)	425,776
Issuance of common stock, net of issue costs	$ 4	902		906
Non-cash stock-based compensation		336		336
Issuance of common stock under stock plans, net of taxes (in shares)	105,882
Issuance of common stock under stock plans, net of taxes
Net loss			(9,253)	(9,253)
Balance (in shares) at Mar. 31, 2020	14,614,890
Balance at Mar. 31, 2020	$ 145	$ 531,587	$ (467,239)	$ 64,493

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net loss	$ (9,253)	$ (6,136)
Adjustments to reconcile net loss to net cash used in operating activities:
(Gain) from change in fair value of derivative warrant liability	(7)	(1)
(Gain) from change in fair value of 2020/21 Notes and 2020 Notes embedded derivative liability	100	(246)
Stock-based compensation	172	263
Depreciation and amortization	1,649	1,612
Non-cash lease expense	15	12
Non-cash interest expense	150	410
Changes in operating assets and liabilities:
Accounts receivable	983	(599)
Inventories	520	(21)
Prepaid expenses and other current assets, deposits and other assets	(167)	157
Accounts payable, accrued expenses, and long-term liabilities	(1,150)	(1,159)
Net cash used in operating activities	(6,988)	(5,708)
Investing Activities
Acquisitions of property, plant and equipment	(777)	(2,204)
Net cash used in investing activities	(777)	(2,204)
Financing Activities
Debt and equity offering costs	(52)	(234)
Proceeds from issuance of common stock, net	958	9,878
Payment of loans payable - other	(154)
Net cash provided by financing activities	752	9,644
Net (decrease) increase in cash and cash equivalents	(7,013)	1,732
us-gaap_CashAndCashEquivalentsAbstract
Beginning of period	16,302	33,734
End of period	9,289	35,466
Cash paid for interest	395	345
Non-cash purchase of property, plant and equipment	380	1,316
Original issue discount paid with 2020/21 Notes	282
Right-of-use asset purchased with financing lease	13
Fair value of right-to-use asset and related lease liability upon adoption of ASC 842 - Leases		$ 1,244

Note 1 - Nature of Business, Fi

Note 1 - Nature of Business, Financial Condition and Basis of Presentation	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	1. Nature of Business, Financial Condition and Basis of Presentation Nature of Business zero Gevo’s production processes and fuel products have been proven to work. Gevo uses low-carbon, renewable resource-based carbohydrates as raw materials. In the near-term, Gevo’s feedstocks will primarily consist of non-food corn. As Gevo’s technology is applied globally, feedstocks can consist of sugar cane, molasses or other cellulosic sugars derived from wood, agricultural residues and waste. Gevo’s patented fermentation yeast biocatalyst produces isobutanol, a four Ultimately, the Company believes that the attainment of profitable operations is dependent upon future events, including (i) completing certain capital improvements at the Company’s production facility located in Luverne, Minnesota (the "Luverne Facility") to increase the production capacity of renewable gasoline and jet fuel and other related products that can be made from isobutanol; (ii) completing the Company's development activities resulting in commercial production and sales of renewable hydrocarbon products; (iii) obtaining adequate financing to complete the Company's development activities, including the build out of renewable hydrocarbon capacity; (iv) gaining market acceptance and demand for the Company's products and services; (v) attracting and retaining qualified personnel; and (vi) achieving a level of revenues adequate to support the Company's cost structure. COVID- 19. 19" third 19 The analysis concluded that the COVID- 19 not first 2020. 19 not first 2020, 19 2020. March 2020, 19 19 2020 19 19 The Company has considered multiple scenarios, with both positive and negative inputs, as part of the significant estimates and assumptions that are inherent in its financial statements and are based on trends in customer behavior and the economic environment throughout the quarter and beyond as the COVID- 19 may may may Following a temporary suspension of ethanol production at the Luverne Facility, the Company ultimately suspended production for the foreseeable future due to the impact of COVID- 19, 2020. In response to the impact of the COVID- 19 March 2020, 26 four Restructuring Expenses 20% April 1, 2020 90 20% 20% 20% three 20% In addition, in connection with the impact that the COVID- 19 April 22, 2020 ( may not June 30, 2024 12 The Delta Amendment also revises the credit support terms in the Delta Agreement to state that the Company and Delta will work to mutually agree upon credit support terms for the take or pay that are acceptable to the Company’s lender to enable the Company to obtain third may In addition, the Delta Amendment revises the ATJ pricing in the Delta Agreement to the extent that if Brent Crude is below a certain cutoff price as of the date that is 60 may 10 Restructuring Expenses. first 2020, 19 March 2020, 26 four one one The Company incurred $0.1 $0.2 no three March 31, 2020, Restructuring expenses $0.02 $0.3 The Company intends to continue developing its hydrocarbon business, including the planned expansion of the Luverne Facility, and the Company expects to move forward in securing the project funding needed to expand the Luverne Facility. The expansion is designed to allow the Company to produce large quantities of low carbon isobutanol, sustainable aviation fuel and renewable isooctane. The Company also expects to continue engineering efforts for the expansion of isobutanol production and the construction of a commercial renewable hydrocarbon production facility, as well as additional decarbonization projects, at the Luverne Facility. As of March 31, 2020, "Accounts payable and accrued liabilities December 31, 2019 Additions Payments March 31, 2020 Severance (including payroll taxes) $ — $ 96 $ — $ 96 Lease agreements — 203 — 203 Total $ — $ 299 $ — $ 299 Financial Condition three March 31, 2020 2019, $9.3 $6.1 $467.2 March 31, 2020. March 31, 2020 $9.3 The Company expects to incur future net losses as it continues to fund the development and commercialization of its product candidates. To date, the Company has financed its operations primarily with proceeds from issuance of equity and debt securities, borrowings under debt facilities and product sales. The Company’s transition to profitability is dependent upon, among other things, the successful development and commercialization of its product candidates and the achievement of a level of revenues adequate to support the Company’s cost structure. The Company may may may no Existing working capital was not one three March 31, 2020 may not At-the-Market Offering Program. February 2018, August 2019, $10.7 During the three March 31, 2020, 425,776 $0.9 March 31, 2020, $7.8 Basis of Presentation. not y at March 31, 2020 not 8 10 December 31, 2019. Income Taxes. no Concentration of Business Risk. March 31, 2020, one 52% December 31, 2019, three 57%, 13% 15% For the three March 31, 2020 2019, 73% 68% 22% 18% three March 31, 2020 2019, 14

Note 2 - Earnings Per Share

Note 2 - Earnings Per Share	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Earnings Per Share [Text Block]	2. Earnings Per Share Basic earnings (loss) per sha re is computed by dividing the net loss for the period by the weighted-average number of common shares outstanding during the period. Diluted earnings (loss) per share (“EPS”) includes the dilutive effect of common stock equivalents and is computed using the weighted-average number of common stock and common stock equivalents outstanding during the reporting period. Diluted EPS for the three March 31, 2020 2019 The following table sets forth securities outstanding that could potentially dilute the calculation of diluted earnings per share: March 31, 2020 2019 Warrants to purchase common stock - liability classified 54,669 55,963 Warrant to purchase common stock - equity classified — 6 Conversion of 2020/21 Notes 6,713,817 — Conversion of 2020 Notes — 1,044,134 Outstanding options to purchase common stock 1,561 2,311 Stock appreciation rights 132,566 132,559 Unvested restricted common stock — 284,300 Total 6,902,613 1,519,273

Note 3 - Revenues From Contract

Note 3 - Revenues From Contracts With Customers; Other Revenues	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	3. Revenues from Contracts with Customers; Other Revenues The Company’s current and historical revenues have consisted of the following: (a) ethanol sales and related products revenue, net; (b) hydrocarbon revenue; and (c) grant and other revenue, which primarily has historically consisted of revenues from governmental and cooperative research grants. Ethanol sales and related products revenues. no Hydrocarbon revenue. no The following table sets forth the components of the Company’s revenues between those generated from contracts with customers and those generated from arrangements that do not Three Months Ended March 31, 2020 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 3,700 $ — $ 3,700 Hydrocarbon revenue 125 — 125 $ 3,825 $ — $ 3,825 Timing of Revenue Recognition Goods transferred at a point in time $ 3,825 $ — $ 3,825 Services transferred over time — — — $ 3,825 $ — $ 3,825 Three Months Ended March 31, 2019 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 5,664 — $ 5,664 Hydrocarbon revenue 739 — 739 $ 6,403 $ — $ 6,403 Timing of Revenue Recognition Goods transferred at a point in time $ 6,403 $ — $ 6,403 Services transferred over time — — — $ 6,403 $ — $ 6,403 Goods transferred at a point-in-time. three March 31, 2020 2019, no March 31, 2020 December 31, 2019, no All goods transferred are tested to ensure product sold satisfies contractual product specifications prior to transfer. The customer obtains control of the goods when title and risk of loss for the goods has transferred, which in most cases is “ free-on-board, shipping point one three no Services transferred over time. three March 31, 2020 2019, no March 31, 2020 December 31, 2019, no Contract Assets and Trade Receivables. March 31, 2020 December 31, 2019, no not no not March 31, 2020 December 31, 2019.

Note 4 - Leases, Right-to-use A

Note 4 - Leases, Right-to-use Assets and Related Liabilities	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	4. The Company enters into various arrangements which constitute a lease as defined by Accounting Standards Codification ("ASC") 842, Leases, The contracts for the Company are comprised of facility, equipment and transportation leases necessary to conduct the Company’s day-to-day operations for which the Company maintains control of right-to-use assets and incurs the related liabilities. The facility lease includes variable payments for common area maintenance. In addition, the Company has one Loans payable - other There are two not March 31, 2020 $3.0 March 31, 2020 December 31, 2019. The following table presents the (a) costs by lease category and (b) other quantitative information relating to the Company’s leases (dollars in thousands): Three Months Ended March 31, 2020 March 31, 2019 Lease Cost Financing lease cost $ 1 $ — Operating lease cost 471 345 Short-Term lease cost 13 17 Variable lease cost 32 33 Total lease cost $ 517 $ 395 Other Information Cash paid for the measurement of lease liabilities: Operating cash flows from finance lease $ 1 $ — Operating cash flows from operating leases 471 345 Right-to-use asset obtained in exchange for new financing lease liability 13 — Weighted-average remaining lease term, financing lease (months) 59 — Weighted-average remaining lease term, operating leases (months) 18 20 Weighted-average discount rate - financing lease 21 % — Weighted-average discount rate - operating leases 12 % 12 % The table below shows the future minimum payments under non-cancelable financing and operating leases at March 31, 2020 Year Ending December 31, Financing Leases Operating Leases 2020 (remaining) $ 3 545 2021 4 336 2022 4 — 2023 4 2024 and thereafter 5 Total 20 881 Less: Amounts representing present value discounts (7 ) (64 ) Total lease liabilities 13 817

Note 5 - Inventories

Note 5 - Inventories	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Inventory Disclosure [Text Block]	5. Inventories The following table sets forth the components of the Company’s inventory balances (in thousands): March 31, December 31, 2020 2019 Raw materials Corn $ 14 $ 267 Enzymes and other inputs 155 184 Finished goods Jet Fuels, Isooctane and Isooctene 795 571 Isobutanol 44 135 Ethanol — 93 Distiller's grains 8 54 Work in process Agri-Energy — 254 Gevo 142 122 Spare parts 1,522 1,521 Total inventories $ 2,680 $ 3,201 Work in process inventory includes unfinished jet fuel, isooctane and isooctene inventory.

Note 6 - Property, Plant and Eq

Note 6 - Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	6. Property, Plant and Equipment The following table sets forth the Company’s property, plant and equipment by classification (in thousands): Useful Life March 31, December 31, (in years) 2020 2019 Luverne retrofit asset 20 $ 70,820 $ 70,820 Plant machinery and equipment 10 17,424 17,413 Site improvements 10 7,054 7,054 Lab equipment, furniture and fixtures and vehicles 5 6,396 6,393 Demonstration plant 2 3,597 3,597 Buildings 10 2,543 2,543 Leasehold improvements, pilot plant, land and support equipment 2 to 5 2,523 2,523 Computer, office equipment and software 3 to 6 2,120 2,034 Construction in progress 8,412 7,710 Total property, plant and equipment 120,889 120,087 Less accumulated depreciation and amortization (55,034 ) (53,391 ) Property, plant and equipment, net $ 65,855 $ 66,696 The Company recorded depreciation and amortization expense related to property, plant and equipment as follows (in thousands): Three Months Ended March 31, 2020 2019 Cost of goods sold $ 1,587 $ 1,560 Operating expenses 56 52 Total depreciation and amortization $ 1,643 $ 1,612

Note 7 - Embedded Derivatives L

Note 7 - Embedded Derivatives Liabilities	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Discussion of Hybrid Instruments and Embedded Derivatives [Text Block]	7. Embedded Derivatives Liabilities 2020 In June 2017, 12% 2020 “2020 12.0% 2017 “2017 2020 2020 “2020 2020 three nine 150% ten 2020 Embedded derivatives are separated from the host contract and the 2020 not 2020 2020 one The Company used a binomial lattice model in order to estimate the fair value of the embedded derivative in the 2020 two 2020 2020 2020 150% ten Using this lattice model, the Company valued the embedded derivative using a “with-and-without method”, where the value of the 2020 2020 2020 2020 2020 2020 2020/21 In January 2020, 12% 2020/2021 “2020/21 12.0% March 2020 ( “2020 2020/21 2020/21 2020/21 2020/21 Embedded derivatives are separated from the host contract and the 2020/21 not 2020/21 2020/21 one The Company used a binomial lattice model in order to estimate the fair value of the embedded derivative in the 2020/21 As of March 31, 2020 December 31, 2019, $0.1 $0, $0.1 2020/21 $0.2 2020 three March 31, 2020 March 31, 2019, 2020/21 2020 The following table sets forth the inputs to the lattice models that were used to value the embedded derivatives: March 31, January 10, December 31, 2020 2020 2019 Stock price $ 0.82 $ 2.27 $ 2.31 Conversion Rate per $1,000 409.50 409.50 67.95 Conversion Price $ 2.44 $ 2.44 $ 14.72 Maturity date December 31, 2020 December 31, 2020 March 15, 2020 Risk-free interest rate 0.16 % 1.52 % 1.52 % Estimated stock volatility 70 % 40 % 60 % Estimated credit spread 40 % 36 % 27 % Changes in certain inputs into the lattice model can have a significant impact on changes in the estimated fair value of the embedded featured within the 2020/21 2020 1 2 3

Note 8 - Accounts Payable and A

Note 8 - Accounts Payable and Accrued Liabilities	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	8. Accounts Payable and Accrued Liabilities The following table sets forth the components of the Company’s accounts payable and accrued liabilities in the consolidated balance sheets (in thousands): March 31, December 31, 2020 2019 Accrued utilities and supplies $ 1,393 $ 645 Accounts payable - trade 911 1,474 Accrued employee compensation 675 1,946 Other accrued liabilities 1,498 1,613 Total accounts payable and accrued liabilities $ 4,477 $ 5,678

Note 9 - Debt

Note 9 - Debt	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Debt Disclosure [Text Block]	9. Debt 2020 2020/21 The following table sets forth information pertaining to the 2020 2020/21 Principal Amount of 2020 Notes Principal Amount of 2020/21 Notes Debt Discount Debt Issue Costs Total Notes Embedded Derivative Total Balance - December 31, 2019 $ 14,053 $ — $ (123 ) $ (30 ) $ 13,900 $ — $ 13,900 Amortization of debt discount — — 95 — 95 — 95 Amortization of debt issue costs — — — 8 8 — 8 Paid-in-kind interest 47 — — — 47 — 47 Exchange of 2020 Notes for 2020/21 Notes (14,100 ) 14,100 — — — — — Original issue discount paid with 2020/21 Notes — 282 (282 ) — — — — Fair value of 2020/21 embedded derivative — — — — — 2,848 2,848 Change in fair value of 2020/21 Notes embedded derivative — — — — — (2,748 ) (2,748 ) Balance - March 31, 2020 $ — $ 14,382 $ (310 ) $ (22 ) $ 14,050 $ 100 $ 14,150 On June 20, 2017, 2020 12.0% 2017 "2017 2020 March 15, 2020 first 2020 12% 2% March 31, June 30, September 30 December 31 2020 2020 Under certain circumstances, the Company had the option to pay a portion of the interest due on the 2020 2020 2020 Additional shares of the Company's common stock could also have become issuable pursuant to the 2020 2020 The 2020 2020 $14.72 0.0679 $1 2020 2020/21 On January 10, 2020, “2020/21 2020 2020/21 2020 2020 $14.1 $14.4 2020/21 “2020/21 2020/21 $7.1 2020/21 “2020/21 2020/21 2.0%, 2020/21 2020/21 180 30 January 10, 2020, 2020/21 2020 “2020/21 April 7, 2020 ( “2020/21 2020/21 $0.7 (Loss) on modification of 2020 The 2020/21 December 31, 2020, April 1, 2021 June 30, 2020 2020/21 19.99% 2020/21 2020/21 December 15, 2020 $7 2020/21 12% 4% March 31, June 30, September 30 December 31 2020/21 2020/21 2020/21 2020/21 2020/21 The 2020/21 2020/21 $2.442 “2020/21 0.4095 $1 2020/21 may 2020/21 2020/21 2020/21 2020/21 10% three Each holder has agreed not 2020/21 4.99% “4.99% may, 61 9.99% “9.99% 2020/21 4.99% 9.99% 2020/21 nine six The 2020/21 may 120 2020/21 2020/21 2020/21 December 31, 2020. 2020/21 may 2020/21 The 2020/21 not 2020/21 2020/21 The 2020/21 2020/21 Additional shares of the Company's common stock could also become issuable pursuant to the 2020/21 2020/21 Under certain circumstances, the Company may one 3 2020/21 Loans Payable - Other During the first 2020, fourth 2019, 4% 21%, $0.1 August 2020 February 2025. March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Equipment $ 318 $ 321 Insurance 289 428 Total notes payable - other 607 749 Less current portion (375 ) (516 ) Long-term portion $ 232 $ 233 Future payments for Loans Payable - Other are as follows (in thousands): Year ending December 31, 2020 (remaining) $ 353 2021 89 2022 65 2023 65 2024 and thereafter 35 $ 607 Small Business Administration Loans In April 2020, $1.0 April 2022 1% November 2020 November 5, 2020, $0.06 eight

Note 10 - Equity Incentive Plan

Note 10 - Equity Incentive Plans	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Stock Incentive Plans Disclosure [Text Block]	10 . Equity Incentive Plans 2010 February 2011, 2010 "2010 2010 June 10, 2019, 2010 3,266,661 February 2020, 109,337 three 1,258 two February 27, 2020. April 2020, 239,155 April 1, 2020 20% 1, May 15, 2020. March 2020, 4,055 March 31, 2020, 1,679,947 2010 Employee Stock Purchase Plan February 2011, January 1 June 30 July 1 December 31 190 190 March 31, 2020 85% first no three March 31, 2020 2019.

Note 11 - Stock-based Compensat

Note 11 - Stock-based Compensation	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	11. Stock-Based Compensation The Company records stock-based compensation expense during the requisite service period for share-based payment awards granted to employees and non-employees. The following table sets forth the Company’s stock-based compensation expense (in thousands) for the periods indicated. Three Months Ended March 31, 2020 2019 Restricted stock Research and development $ 76 $ 28 Selling, general and administrative 260 206 Stock appreciation rights Research and development (79 ) 16 Selling, general and administrative (85 ) 13 Total stock-based compensation $ 172 $ 263 Stock Option Award Activity March 31, 2020 three March 31, 2020 Weighted- Average Weighted- Remaining Average Contractual Aggregate Number of Exercise Term Intrinsic Options Price (years) Value Options outstanding at December 31, 2019 1,561 $ 928.79 6.56 $ — Granted — $ — Canceled or forfeited — $ — Exercised — $ — Options outstanding at March 31, 2020 1,561 $ 928.79 6.31 $ — Options exercisable at March 31, 2020 1,561 $ 928.79 6.31 $ — Options vested and expected to vest at March 31, 2020 1,561 $ 928.79 6.31 $ — Restricted Stock March 31, 2020 three March 31, 2020 Weighted- Average Number of Grant-Date Shares Fair Value Non-vested at December 31, 2019 1,308,613 $ 1.91 Granted 110,595 $ 1.51 Vested (19,153 ) $ 1.87 Canceled or forfeited (6,974 ) $ 1.90 Non-vested at March 31, 2020 1,393,081 $ 1.83 The total fair value of restricted stock that vested during the three March 31, 2020 $0.3 March 31, 2020, $1.7 1.2

Note 12 - Commitments and Conti

Note 12 - Commitments and Contingencies	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	12. Commitments and Contingencies Legal Matters may not not Indemnifications may March 31, 2020 December 31, 2019, not In addition, the Company, as permitted under Delaware law and in accordance with its amended and restated certificate of incorporation and amended and restated bylaws, in each case, as amended to date, indemnifies its officers and directors for certain events or occurrences, subject to certain limits, while the officer or director is or was serving at the Company’s request in such capacity. The duration of these indemnifications, commitments, and guarantees varies and, in certain cases, is indefinite. The maximum amount of potential future indemnification is unlimited; however, the Company has a director and officer insurance policy that may may No Environmental Liabilities No March 31, 2020.

Note 13 - Fair Value Measuremen

Note 13 - Fair Value Measurements	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Fair Value Disclosures [Text Block]	13. Fair Value Measurements Accounting standards define fair value, outline a framework for measuring fair value, and detail the required disclosures about fair value measurements. Under these standards, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in the principal or most advantageous market. Standards establish a hierarchy in determining the fair market value of an asset or liability. The fair value hierarchy has three Level 1 Level 2 1, 2 Level 3 no These tables present the carrying value and fair value, by fair value hierarchy, of our financial instruments, excluding cash and cash equivalents, accounts receivable and accounts payable, which approximate fair value due to their short-term nature, at March 31, 2020 December 31, 2019, Fair Value Measurements at March 31, 2020 (In thousands) Fair Value at March 31, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring: Derivative Warrant Liability $ 1 $ — $ — $ 1 2020/21 Notes Embedded Derivative Liability 100 — — 100 Total Recurring Fair Value Measurements $ 101 $ — $ — $ 101 Nonrecurring Corn and finished goods inventory $ 387 $ 14 $ 373 $ — Fair Value Measurements at December 31, 2019 (In thousands) Fair Value at December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring: Derivative Warrant Liability $ 8 $ — $ — $ 8 Nonrecurring Corn and finished goods inventory $ 940 $ 267 $ 673 $ — The following table provides changes to those fair value measurements using Level 3 three d March 31, 2020 ( Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Derivative Warrant Liability 2020/21 Notes Embedded Derivative Balance, December 31, 2019 $ 8 $ — Issue of 2020/21 Notes embedded derivative liability — 2,848 Total (gains) included in earnings (7 ) (2,748 ) Balance, March 31, 2020 $ 1 $ 100 There were no 3 three March 31, 2020. Inventories. The Company records its corn inventory at fair value only when the Company’s cost of corn purchased exceeds the market value for corn. The Company determines the market value of corn and dry distiller’s grain based upon Level 1 2 2020/21 Notes Embedded Derivative . The Company had estimated the fair value of the embedded derivative on a stand-alone basis to be $0.1 March 31, 2020 3 Change in fair value of 2020/21 ” in the consolidated Statements 7, Embedded Derivatives While the Company believes that its valuation methods are appropriate and consistent with other market participants, it recognizes that the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Note 14 - Segments

Note 14 - Segments	3 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	14. Segments The Company has determined that it has two Gevo Segment Gevo Development/Agri-Energy Segment The Company’s chief operating decision maker is provided with and reviews the financial results of each of the Company’s consolidated legal entities, Gevo, Inc., Gevo Development, LLC and Agri-Energy, LLC. The Company organizes its business segments based on the nature of the products and services offered through each of its consolidated legal entities. All revenue is earned and all assets are held in the U.S. Three Months Ended March 31, 2020 2019 Revenues: Gevo $ 125 $ 739 Gevo Development / Agri-Energy 3,700 5,664 Consolidated $ 3,825 $ 6,403 Loss from operations: Gevo $ (2,881 ) $ (2,673 ) Gevo Development / Agri-Energy (5,095 ) (2,955 ) Consolidated $ (7,976 ) $ (5,628 ) Interest expense: Gevo $ 543 $ 755 Gevo Development / Agri-Energy 2 — Consolidated $ 545 $ 755 Depreciation and amortization expense: Gevo $ 56 $ 51 Gevo Development / Agri-Energy 1,593 1,561 Consolidated $ 1,649 $ 1,612 Acquisitions of plant, property and equipment: Gevo $ 10 $ 2 Gevo Development / Agri-Energy 791 2,202 Consolidated $ 801 $ 2,204 Revenue by geographic area United States $ 3,750 $ 5,664 Other 75 739 Consolidated $ 3,825 $ 6,403 March 31, December 31, 2020 2019 Total assets Gevo $ 80,279 $ 91,861 Gevo Development / Agri-Energy 140,293 143,349 Intercompany eliminations (1) (136,410 ) (141,851 ) Consolidated (2) $ 84,162 $ 93,359 ( 1 Includes intercompany sales of $0.1 three March 31, 2020 $0.4 December 31, 2019 ( 2 All other significant non-cash items relate to the activities of Gevo.

Significant Accounting Policies

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Nature of Business [Policy Text Block]	Nature of Business zero Gevo’s production processes and fuel products have been proven to work. Gevo uses low-carbon, renewable resource-based carbohydrates as raw materials. In the near-term, Gevo’s feedstocks will primarily consist of non-food corn. As Gevo’s technology is applied globally, feedstocks can consist of sugar cane, molasses or other cellulosic sugars derived from wood, agricultural residues and waste. Gevo’s patented fermentation yeast biocatalyst produces isobutanol, a four Ultimately, the Company believes that the attainment of profitable operations is dependent upon future events, including (i) completing certain capital improvements at the Company’s production facility located in Luverne, Minnesota (the "Luverne Facility") to increase the production capacity of renewable gasoline and jet fuel and other related products that can be made from isobutanol; (ii) completing the Company's development activities resulting in commercial production and sales of renewable hydrocarbon products; (iii) obtaining adequate financing to complete the Company's development activities, including the build out of renewable hydrocarbon capacity; (iv) gaining market acceptance and demand for the Company's products and services; (v) attracting and retaining qualified personnel; and (vi) achieving a level of revenues adequate to support the Company's cost structure. COVID- 19. 19" third 19 The analysis concluded that the COVID- 19 not first 2020. 19 not first 2020, 19 2020. March 2020, 19 19 2020 19 19 The Company has considered multiple scenarios, with both positive and negative inputs, as part of the significant estimates and assumptions that are inherent in its financial statements and are based on trends in customer behavior and the economic environment throughout the quarter and beyond as the COVID- 19 may may may Following a temporary suspension of ethanol production at the Luverne Facility, the Company ultimately suspended production for the foreseeable future due to the impact of COVID- 19, 2020. In response to the impact of the COVID- 19 March 2020, 26 four Restructuring Expenses 20% April 1, 2020 90 20% 20% 20% three 20% In addition, in connection with the impact that the COVID- 19 April 22, 2020 ( may not June 30, 2024 12 The Delta Amendment also revises the credit support terms in the Delta Agreement to state that the Company and Delta will work to mutually agree upon credit support terms for the take or pay that are acceptable to the Company’s lender to enable the Company to obtain third may In addition, the Delta Amendment revises the ATJ pricing in the Delta Agreement to the extent that if Brent Crude is below a certain cutoff price as of the date that is 60 may 10
Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block]	Restructuring Expenses. first 2020, 19 March 2020, 26 four one one The Company incurred $0.1 $0.2 no three March 31, 2020, Restructuring expenses $0.02 $0.3 The Company intends to continue developing its hydrocarbon business, including the planned expansion of the Luverne Facility, and the Company expects to move forward in securing the project funding needed to expand the Luverne Facility. The expansion is designed to allow the Company to produce large quantities of low carbon isobutanol, sustainable aviation fuel and renewable isooctane. The Company also expects to continue engineering efforts for the expansion of isobutanol production and the construction of a commercial renewable hydrocarbon production facility, as well as additional decarbonization projects, at the Luverne Facility. As of March 31, 2020, "Accounts payable and accrued liabilities December 31, 2019 Additions Payments March 31, 2020 Severance (including payroll taxes) $ — $ 96 $ — $ 96 Lease agreements — 203 — 203 Total $ — $ 299 $ — $ 299
Financial Condition [Policy Text Block]	Financial Condition three March 31, 2020 2019, $9.3 $6.1 $467.2 March 31, 2020. March 31, 2020 $9.3 The Company expects to incur future net losses as it continues to fund the development and commercialization of its product candidates. To date, the Company has financed its operations primarily with proceeds from issuance of equity and debt securities, borrowings under debt facilities and product sales. The Company’s transition to profitability is dependent upon, among other things, the successful development and commercialization of its product candidates and the achievement of a level of revenues adequate to support the Company’s cost structure. The Company may may may no Existing working capital was not one three March 31, 2020 may not
At-the-market Offering Program, Policy [Policy Text Block]	At-the-Market Offering Program. February 2018, August 2019, $10.7 During the three March 31, 2020, 425,776 $0.9 March 31, 2020, $7.8
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation. not y at March 31, 2020 not 8 10 December 31, 2019.
Income Tax, Policy [Policy Text Block]	Income Taxes. no
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Business Risk. March 31, 2020, one 52% December 31, 2019, three 57%, 13% 15% For the three March 31, 2020 2019, 73% 68% 22% 18% three March 31, 2020 2019, 14

Note 1 - Nature of Business, _2

Note 1 - Nature of Business, Financial Condition and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	December 31, 2019 Additions Payments March 31, 2020 Severance (including payroll taxes) $ — $ 96 $ — $ 96 Lease agreements — 203 — 203 Total $ — $ 299 $ — $ 299

Note 2 - Earnings Per Share (Ta

Note 2 - Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	March 31, 2020 2019 Warrants to purchase common stock - liability classified 54,669 55,963 Warrant to purchase common stock - equity classified — 6 Conversion of 2020/21 Notes 6,713,817 — Conversion of 2020 Notes — 1,044,134 Outstanding options to purchase common stock 1,561 2,311 Stock appreciation rights 132,566 132,559 Unvested restricted common stock — 284,300 Total 6,902,613 1,519,273

Note 3 - Revenues From Contra_2

Note 3 - Revenues From Contracts With Customers; Other Revenues (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three Months Ended March 31, 2020 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 3,700 $ — $ 3,700 Hydrocarbon revenue 125 — 125 $ 3,825 $ — $ 3,825 Timing of Revenue Recognition Goods transferred at a point in time $ 3,825 $ — $ 3,825 Services transferred over time — — — $ 3,825 $ — $ 3,825 Three Months Ended March 31, 2019 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 5,664 — $ 5,664 Hydrocarbon revenue 739 — 739 $ 6,403 $ — $ 6,403 Timing of Revenue Recognition Goods transferred at a point in time $ 6,403 $ — $ 6,403 Services transferred over time — — — $ 6,403 $ — $ 6,403

Note 4 - Leases, Right-to-use_2

Note 4 - Leases, Right-to-use Assets and Related Liabilities (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Lease, Cost [Table Text Block]	Three Months Ended March 31, 2020 March 31, 2019 Lease Cost Financing lease cost $ 1 $ — Operating lease cost 471 345 Short-Term lease cost 13 17 Variable lease cost 32 33 Total lease cost $ 517 $ 395 Other Information Cash paid for the measurement of lease liabilities: Operating cash flows from finance lease $ 1 $ — Operating cash flows from operating leases 471 345 Right-to-use asset obtained in exchange for new financing lease liability 13 — Weighted-average remaining lease term, financing lease (months) 59 — Weighted-average remaining lease term, operating leases (months) 18 20 Weighted-average discount rate - financing lease 21 % — Weighted-average discount rate - operating leases 12 % 12 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Year Ending December 31, Financing Leases Operating Leases 2020 (remaining) $ 3 545 2021 4 336 2022 4 — 2023 4 2024 and thereafter 5 Total 20 881 Less: Amounts representing present value discounts (7 ) (64 ) Total lease liabilities 13 817

Note 5 - Inventories (Tables)

Note 5 - Inventories (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Schedule of Inventory, Current [Table Text Block]	March 31, December 31, 2020 2019 Raw materials Corn $ 14 $ 267 Enzymes and other inputs 155 184 Finished goods Jet Fuels, Isooctane and Isooctene 795 571 Isobutanol 44 135 Ethanol — 93 Distiller's grains 8 54 Work in process Agri-Energy — 254 Gevo 142 122 Spare parts 1,522 1,521 Total inventories $ 2,680 $ 3,201

Note 6 - Property, Plant and _2

Note 6 - Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Property, Plant and Equipment [Table Text Block]	Useful Life March 31, December 31, (in years) 2020 2019 Luverne retrofit asset 20 $ 70,820 $ 70,820 Plant machinery and equipment 10 17,424 17,413 Site improvements 10 7,054 7,054 Lab equipment, furniture and fixtures and vehicles 5 6,396 6,393 Demonstration plant 2 3,597 3,597 Buildings 10 2,543 2,543 Leasehold improvements, pilot plant, land and support equipment 2 to 5 2,523 2,523 Computer, office equipment and software 3 to 6 2,120 2,034 Construction in progress 8,412 7,710 Total property, plant and equipment 120,889 120,087 Less accumulated depreciation and amortization (55,034 ) (53,391 ) Property, plant and equipment, net $ 65,855 $ 66,696
Schedule of Depreciation and Amortization Expense [Table Text Block]	Three Months Ended March 31, 2020 2019 Cost of goods sold $ 1,587 $ 1,560 Operating expenses 56 52 Total depreciation and amortization $ 1,643 $ 1,612

Note 7 - Embedded Derivatives_2

Note 7 - Embedded Derivatives Liabilities (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Defined Benefit Plan, Assumptions [Table Text Block]	March 31, January 10, December 31, 2020 2020 2019 Stock price $ 0.82 $ 2.27 $ 2.31 Conversion Rate per $1,000 409.50 409.50 67.95 Conversion Price $ 2.44 $ 2.44 $ 14.72 Maturity date December 31, 2020 December 31, 2020 March 15, 2020 Risk-free interest rate 0.16 % 1.52 % 1.52 % Estimated stock volatility 70 % 40 % 60 % Estimated credit spread 40 % 36 % 27 %

Note 8 - Accounts Payable and_2

Note 8 - Accounts Payable and Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	March 31, December 31, 2020 2019 Accrued utilities and supplies $ 1,393 $ 645 Accounts payable - trade 911 1,474 Accrued employee compensation 675 1,946 Other accrued liabilities 1,498 1,613 Total accounts payable and accrued liabilities $ 4,477 $ 5,678

Note 9 - Debt (Tables)

Note 9 - Debt (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Schedule of Debt [Table Text Block]	Principal Amount of 2020 Notes Principal Amount of 2020/21 Notes Debt Discount Debt Issue Costs Total Notes Embedded Derivative Total Balance - December 31, 2019 $ 14,053 $ — $ (123 ) $ (30 ) $ 13,900 $ — $ 13,900 Amortization of debt discount — — 95 — 95 — 95 Amortization of debt issue costs — — — 8 8 — 8 Paid-in-kind interest 47 — — — 47 — 47 Exchange of 2020 Notes for 2020/21 Notes (14,100 ) 14,100 — — — — — Original issue discount paid with 2020/21 Notes — 282 (282 ) — — — — Fair value of 2020/21 embedded derivative — — — — — 2,848 2,848 Change in fair value of 2020/21 Notes embedded derivative — — — — — (2,748 ) (2,748 ) Balance - March 31, 2020 $ — $ 14,382 $ (310 ) $ (22 ) $ 14,050 $ 100 $ 14,150
Schedule of Long-term Debt Instruments [Table Text Block]	March 31, 2020 December 31, 2019 Equipment $ 318 $ 321 Insurance 289 428 Total notes payable - other 607 749 Less current portion (375 ) (516 ) Long-term portion $ 232 $ 233
Schedule of Maturities of Long-term Debt [Table Text Block]	Year ending December 31, 2020 (remaining) $ 353 2021 89 2022 65 2023 65 2024 and thereafter 35 $ 607

Note 11 - Stock-based Compens_2

Note 11 - Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Share-based Payment Arrangement, Cost by Plan [Table Text Block]	Three Months Ended March 31, 2020 2019 Restricted stock Research and development $ 76 $ 28 Selling, general and administrative 260 206 Stock appreciation rights Research and development (79 ) 16 Selling, general and administrative (85 ) 13 Total stock-based compensation $ 172 $ 263
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Weighted- Remaining Average Contractual Aggregate Number of Exercise Term Intrinsic Options Price (years) Value Options outstanding at December 31, 2019 1,561 $ 928.79 6.56 $ — Granted — $ — Canceled or forfeited — $ — Exercised — $ — Options outstanding at March 31, 2020 1,561 $ 928.79 6.31 $ — Options exercisable at March 31, 2020 1,561 $ 928.79 6.31 $ — Options vested and expected to vest at March 31, 2020 1,561 $ 928.79 6.31 $ —
Schedule of Nonvested Share Activity [Table Text Block]	Weighted- Average Number of Grant-Date Shares Fair Value Non-vested at December 31, 2019 1,308,613 $ 1.91 Granted 110,595 $ 1.51 Vested (19,153 ) $ 1.87 Canceled or forfeited (6,974 ) $ 1.90 Non-vested at March 31, 2020 1,393,081 $ 1.83

Note 13 - Fair Value Measurem_2

Note 13 - Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	Fair Value Measurements at March 31, 2020 (In thousands) Fair Value at March 31, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring: Derivative Warrant Liability $ 1 $ — $ — $ 1 2020/21 Notes Embedded Derivative Liability 100 — — 100 Total Recurring Fair Value Measurements $ 101 $ — $ — $ 101 Nonrecurring Corn and finished goods inventory $ 387 $ 14 $ 373 $ — Fair Value Measurements at December 31, 2019 (In thousands) Fair Value at December 31, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring: Derivative Warrant Liability $ 8 $ — $ — $ 8 Nonrecurring Corn and finished goods inventory $ 940 $ 267 $ 673 $ —
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Derivative Warrant Liability 2020/21 Notes Embedded Derivative Balance, December 31, 2019 $ 8 $ — Issue of 2020/21 Notes embedded derivative liability — 2,848 Total (gains) included in earnings (7 ) (2,748 ) Balance, March 31, 2020 $ 1 $ 100

Note 14 - Segments (Tables)

Note 14 - Segments (Tables)	3 Months Ended
	Mar. 31, 2020
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended March 31, 2020 2019 Revenues: Gevo $ 125 $ 739 Gevo Development / Agri-Energy 3,700 5,664 Consolidated $ 3,825 $ 6,403 Loss from operations: Gevo $ (2,881 ) $ (2,673 ) Gevo Development / Agri-Energy (5,095 ) (2,955 ) Consolidated $ (7,976 ) $ (5,628 ) Interest expense: Gevo $ 543 $ 755 Gevo Development / Agri-Energy 2 — Consolidated $ 545 $ 755 Depreciation and amortization expense: Gevo $ 56 $ 51 Gevo Development / Agri-Energy 1,593 1,561 Consolidated $ 1,649 $ 1,612 Acquisitions of plant, property and equipment: Gevo $ 10 $ 2 Gevo Development / Agri-Energy 791 2,202 Consolidated $ 801 $ 2,204 Revenue by geographic area United States $ 3,750 $ 5,664 Other 75 739 Consolidated $ 3,825 $ 6,403 March 31, December 31, 2020 2019 Total assets Gevo $ 80,279 $ 91,861 Gevo Development / Agri-Energy 140,293 143,349 Intercompany eliminations (1) (136,410 ) (141,851 ) Consolidated (2) $ 84,162 $ 93,359

Note 1 - Nature of Business, _3

Note 1 - Nature of Business, Financial Condition and Basis of Presentation (Details Textual) $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended
	Apr. 30, 2020	Aug. 31, 2019USD ($)	Mar. 31, 2020USD ($)shares	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Restructuring Charges, Total			$ 299
Net Income (Loss) Attributable to Parent, Total			(9,253)	(6,136)
Retained Earnings (Accumulated Deficit), Ending Balance			(467,239)		$ (457,986)
Cash and Cash Equivalents, at Carrying Value, Ending Balance			9,289		$ 16,302
Proceeds from Issuance of Common Stock			958	$ 9,878
Income Tax Expense (Benefit), Total			$ 0
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Customer			1		3
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Air Total International SA [Member]
Concentration Risk, Percentage			52.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Eco-Energy, LLC [Member]
Concentration Risk, Percentage					57.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Purina Animal Nutrition, LLC [Member]
Concentration Risk, Percentage					13.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | HCS Group GmbH [Member]
Concentration Risk, Percentage					15.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Eco-Energy, LLC [Member]
Concentration Risk, Percentage			73.00%	68.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Purina Animal Nutrition, LLC [Member]
Concentration Risk, Percentage			22.00%	18.00%
At-the-market Offering [Member]
Increase (Decrease) in At-the-Market Offering of Stock		$ 10,700
Stock Issued During Period, Shares, New Issues (in shares) | shares			425,776
Proceeds from Issuance of Common Stock			$ 900
Offering of Stock, Remaining Capacity, Shares (in shares) | shares			7,800,000
Gevo [Member]
Restructuring Charges, Total			$ 20
Gevo Development / Agri-Energy [Member]
Restructuring Charges, Total			$ 300
Workforce Reduced at Luverne Facility [Member]
Restructuring and Related Cost, Number of Positions Eliminated			26
Workforce Reduced at Corporate Headquarters [Member]
Restructuring and Related Cost, Number of Positions Eliminated			4
Employee Severance [Member]
Restructuring Charges, Total			$ 96
Lease Agreement [Member]
Restructuring Charges, Total			$ 203
Subsequent Event [Member]
Percentage of Salaries Reductions in Reponse to COVID-19	20.00%
Officers [Member] | Subsequent Event [Member]
Percentage of Salaries Reductions in Reponse to COVID-19	20.00%
Certain Remaining Employees [Member] | Subsequent Event [Member]
Percentage of Salaries Reductions in Reponse to COVID-19	20.00%

Note 1 - Nature of Business, _4

Note 1 - Nature of Business, Financial Condition and Basis of Presentation - Restruturing Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance
Additions	299
Payments
Balance	299
Employee Severance [Member]
Balance
Additions	96
Payments
Balance	96
Lease Agreement [Member]
Balance
Additions	203
Payments
Balance	$ 203

Note 2 - Earnings Per Share - S

Note 2 - Earnings Per Share - Securities that Potentially Dilute Calculation of Diluted Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Potentially dilute securities (in shares)	6,902,613	1,519,273
Share-based Payment Arrangement, Option [Member]
Potentially dilute securities (in shares)	1,561	2,311
Stock Appreciation Rights (SARs) [Member]
Potentially dilute securities (in shares)	132,566	132,559
Restricted Stock [Member]
Potentially dilute securities (in shares)		284,300
Convertible 2020/21 Notes [Member]
Potentially dilute securities (in shares)	6,713,817
Convertible 2020 Notes [Member]
Potentially dilute securities (in shares)		1,044,134
Warrant [Member]
Potentially dilute securities (in shares)	54,669	55,963
Warrants Classified as Equity [Member]
Potentially dilute securities (in shares)		6

Note 3 - Revenues From Contra_3

Note 3 - Revenues From Contracts With Customers; Other Revenues (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue from Contract with Customer, Including Assessed Tax	$ 3,825	$ 6,403
Contract with Customer, Asset, after Allowance for Credit Loss, Total	0		$ 0
Contract with Customer, Asset, Credit Loss Expense (Reversal)	0		0
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	3,825	6,403
Transferred at Point in Time [Member] | Variable Consideration or Multiple Performance Obligations [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0
Revenue, Remaining Performance Obligation, Amount	0		0
Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax
Transferred over Time [Member] | Variable Consideration or Multiple Performance Obligations [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	$ 0
Revenue, Remaining Performance Obligation, Amount	$ 0		$ 0

Note 3 - Revenues From Contra_4

Note 3 - Revenues From Contracts With Customers; Other Revenues - Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from Contract with Customer, Including Assessed Tax	$ 3,825	$ 6,403
Other revenues
Total revenues	3,825	6,403
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	3,825	6,403
Other revenues
Total revenues	3,825	6,403
Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax
Other revenues
Total revenues
Ethanol Sales and Related Products [Member]
Revenue from Contract with Customer, Including Assessed Tax	3,700	5,664
Other revenues
Total revenues	3,700	5,664
Hydrocarbon [Member]
Revenue from Contract with Customer, Including Assessed Tax	125	739
Other revenues
Total revenues	$ 125	$ 739

Note 4 - Leases, Right-to-use_3

Note 4 - Leases, Right-to-use Assets and Related Liabilities (Details Textual) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Right-of-Use Asset, Not yet Commenced, Fair Value	$ 3
Lessee, Operating Lease, Liability, Not yet Commenced, Fair Value		$ 3

Note 4 - Leases, Right-to-use_4

Note 4 - Leases, Right-to-use Assets and Related Liabilities - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Financing lease cost	$ 1
Operating lease cost	471	345
Short-Term lease cost	13	17
Variable lease cost	32	33
Total lease cost	517	395
Operating cash flows from finance lease	1
Operating cash flows from operating leases	471	345
Right-of-use asset purchased with financing lease	$ 13
Weighted-average remaining lease term, financing lease (months) (Month)	4 years 330 days
Weighted-average remaining lease term, operating leases (months) (Month)	1 year 180 days	1 year 240 days
Weighted-average discount rate - financing lease	21.00%
Weighted-average discount rate - operating leases	12.00%	12.00%

Note 4 - Leases, Right-to-Use_5

Note 4 - Leases, Right-to-Use Assets and Related Liabilities - Future Minimum Payments Under Non-cancelable Operating Leases (Details) $ in Thousands	Mar. 31, 2020USD ($)
2020 (remaining), financing leases	$ 3
2020 (remaining), operating leases	545
2021, financing leases	4
2021, operating leases	336
2022, financing leases	4
2022, operating leases
2023, financing leases	4
2023, operating leases
2024 and thereafter, financing leases	5
2024 and thereafter, operating leases
Total, financing leases	20
Total, operating leases	881
Less: Amounts representing present value discounts, financing leases	(7)
Less: Amounts representing present value discounts, operating leases	(64)
Accounts Payable, Accrued Liabilities and Other Noncurrent Liabilities [Member]
Total lease liabilities, financing leases	13
Total lease liabilities, operating leases	$ 817

Note 5 - Inventories - Componen

Note 5 - Inventories - Components of Inventory Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Spare parts	$ 1,522	$ 1,521
Total inventories	2,680	3,201
Corn [Member]
Raw materials	14	267
Enzymes and Other Inputs [Member]
Raw materials	155	184
Jet Fuels, Isooctane and Isooctene [Member]
Finished goods	795	571
Isobutanol [Member]
Finished goods	44	135
Ethanol [Member]
Finished goods		93
Distiller's Grains [Member]
Finished goods	8	54
Agri-Energy [Member]
Work in process		254
Gevo [Member]
Work in process	$ 142	$ 122

Note 6 - Property, Plant and _3

Note 6 - Property, Plant and Equipment - Property, Plant and Equipment by Classification (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Property, plant, and equipment, gross	$ 120,889	$ 120,087
Less accumulated depreciation and amortization	(55,034)	(53,391)
Property, plant and equipment, net	$ 65,855	66,696
Retrofit Assets [Member]
Property, plant and equipment, useful life (Year)	20 years
Property, plant, and equipment, gross	$ 70,820	70,820
Machinery and Equipment [Member]
Property, plant and equipment, useful life (Year)	10 years
Property, plant, and equipment, gross	$ 17,424	17,413
Site Improvement [Member]
Property, plant and equipment, useful life (Year)	10 years
Property, plant, and equipment, gross	$ 7,054	7,054
Lab Equipment, Furniture and Fixtures, and Vehicles [Member]
Property, plant and equipment, useful life (Year)	5 years
Property, plant, and equipment, gross	$ 6,396	6,393
Demonstration Plant [Member]
Property, plant and equipment, useful life (Year)	2 years
Property, plant, and equipment, gross	$ 3,597	3,597
Building [Member]
Property, plant and equipment, useful life (Year)	10 years
Property, plant, and equipment, gross	$ 2,543	2,543
Leasehold Improvements [Member]
Property, plant, and equipment, gross	$ 2,523	2,523
Leasehold Improvements [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	2 years
Leasehold Improvements [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	5 years
Computer, Office Equipment, and Software [Member]
Property, plant, and equipment, gross	$ 2,120	2,034
Computer, Office Equipment, and Software [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Computer, Office Equipment, and Software [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	6 years
Construction in Progress [Member]
Property, plant, and equipment, gross	$ 8,412	$ 7,710

Note 6 - Property, Plant and _4

Note 6 - Property, Plant and Equipment - Depreciation and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Depreciation and amortization	$ 1,643	$ 1,612
Cost of Sales [Member]
Depreciation and amortization	1,587	1,560
Operating Expense [Member]
Depreciation and amortization	$ 56	$ 52

Note 7 - Embedded Derivatives_3

Note 7 - Embedded Derivatives Liabilities (Details Textual) $ in Thousands	1 Months Ended	3 Months Ended
	Jun. 30, 2017	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Jan. 31, 2020	Jan. 10, 2020	Dec. 31, 2019USD ($)	Apr. 19, 2017
Embedded Derivative, Fair Value of Embedded Derivative, Net, Total		$ 100				$ 0
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net, Total		(100)	$ 246
Embedded Derivative, 2020/21 Convertible Notes [Member]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net, Total		(100)
Embedded Derivative, 2020 Convertible Notes [Member]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net, Total		$ 200
Convertible 2020 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	12.00%						12.00%
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	150.00%
Debt Instrument, Convertible, Threshold Consecutive Trading Days	10
Number of Embedded Derivative	1
Convertible 2017 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	12.00%
Convertible 2020/21 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage				12.00%	12.00%

Note 7 - Embedded Derivatives_4

Note 7 - Embedded Derivatives Liabilities - Schedule of Inputs to Lattice Model Used to Value Embedded Derivatives (Details)	Mar. 31, 2020	Jan. 10, 2020	Dec. 31, 2019
Measurement Input, Exercise Price [Member]
Embedded derivative liability, measurement input	0.82	2.27	2.31
Measurement Input, Conversion Rate, Per 1000 dollars [Member]
Embedded derivative liability, measurement input	409.5	409.5	67.95
Measurement Input, Conversion Price [Member]
Embedded derivative liability, measurement input	2.44	2.44	14.72
Measurement Input, Maturity [Member]
Embedded derivative liability, measurement input	312,020	312,020	152,020
Measurement Input, Risk Free Interest Rate [Member]
Embedded derivative liability, measurement input	0.0016	0.0152	0.0152
Measurement Input, Price Volatility [Member]
Embedded derivative liability, measurement input	0.7	0.4	0.6
Measurement Input, Entity Credit Risk [Member]
Embedded derivative liability, measurement input	0.4	0.36	0.27

Note 8 - Accounts Payable and_3

Note 8 - Accounts Payable and Accrued Liabilities - Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accrued utilities and supplies	$ 1,393	$ 645
Accounts payable - trade	911	1,474
Accrued employee compensation	675	1,946
Other accrued liabilities	1,498	1,613
Total accounts payable and accrued liabilities	$ 4,477	$ 5,678

Note 9 - Debt (Details Textual)

Note 9 - Debt (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jan. 10, 2020	Apr. 19, 2017	Apr. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Jan. 31, 2020	Dec. 31, 2019	Jun. 30, 2017
Gain (Loss) on Extinguishment of Debt, Total				$ (669)
Notes Payable, Other Payables [Member]
Long-term Debt, Total				607			$ 749
Debt Instrument, Periodic Payment, Total				$ 100
Notes Payable, Other Payables [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage				4.00%
Notes Payable, Other Payables [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage				21.00%
Convertible 2020 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		12.00%						12.00%
Debt Instrument, Interest Rate, Paid In Kind Percentage		2.00%
Debt Instrument, Convertible, Conversion Price (in dollars per share)		$ 14.72
Debt Instrument, Convertible, Conversion Ratio		0.0679
Long-term Debt, Total							$ 14,100
Gain (Loss) on Extinguishment of Debt, Total				$ (700)
Beneficial Ownership Limitation, Percentage		4.99%
Beneficial Ownership Limitation Percentage, Notice (Day)		61 days
Beneficial Ownership Limitation After Notice, Percentage		9.99%
Convertible 2020/21 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	12.00%					12.00%
Debt Instrument, Convertible, Conversion Price (in dollars per share)	$ 2.442
Debt Instrument, Convertible, Conversion Ratio	0.4095
Debt Instrument, Face Amount	$ 14,400
Maximum Principal Amount of Notes Issuable Upon Option Exercise	$ 7,100
Original Issue Discount	2.00%
Debt Instrument, Indenture, Maturity Extension, Trigger, Percentage of Outstanding Shares	19.99%
Debt Instrument, Indenture, Maturity Extension, Trigger, Outstanding Balance	$ 7,000
Debt Instrument, PIK Interest	4.00%
Debt Instrument, Conversion Price Reduction, Discount Rate	10.00%
SBA Loans [Member] | Subsequent Event [Member]
Debt Instrument, Periodic Payment, Total			$ 60
Proceeds from Paycheck Protection Program Under CARES Act			$ 1,000

Note 9 - Debt - Information Per

Note 9 - Debt - Information Pertaining to Convertible Notes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance	$ 13,900
Balance
Original issue discount paid with 2020/21 Notes	282
Change in fair value of 2020/21 Notes embedded derivative	100	$ (246)
Balance	14,050
Balance	100
Embedded Derivative, Convertible Notes [Member]
Balance
Fair value of 2020/21 embedded derivative	2,848
Change in fair value of 2020/21 Notes embedded derivative	(2,748)
Balance	100
Convertible Debt [Member]
Balance	(123)
Balance	(30)
Balance	13,900
Amortization of debt discount	95
Amortization of debt issue costs	8
Paid-in-kind interest	47
Original issue discount paid with 2020/21 Notes	(282)
Balance	(310)
Balance	(22)
Balance	14,050
Convertible 2020 Notes [Member] | Convertible Debt [Member]
Balance	14,053
Paid-in-kind interest	47
Exchange of 2020 Notes for 2020/21 Notes	(14,100)
Original issue discount paid with 2020/21 Notes
Balance
Convertible 2020/21 Notes [Member] | Convertible Debt [Member]
Balance
Paid-in-kind interest
Exchange of 2020 Notes for 2020/21 Notes	14,100
Original issue discount paid with 2020/21 Notes	282
Balance	14,382
Convertible Debt and Embedded Derivative Liabilities [Member]
Balance	13,900
Amortization of debt discount	95
Amortization of debt issue costs	8
Paid-in-kind interest	47
Fair value of 2020/21 embedded derivative	2,848
Change in fair value of 2020/21 Notes embedded derivative	(2,748)
Balance	$ 14,150

Note 9 - Debt - Notes Payable -

Note 9 - Debt - Notes Payable - Other (Details) - Notes Payable, Other Payables [Member] - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Notes payable, other	$ 607	$ 749
Less current portion	(375)	(516)
Long-term portion	232	233
Notes Payable, Equipment [Member]
Notes payable, other	318	321
Notes Payable, Insurance [Member]
Notes payable, other	$ 289	$ 428

Note 9 - Debt - Future Payments

Note 9 - Debt - Future Payments for Notes Payable - Other (Details) - Notes Payable, Other Payables [Member] - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
2020 (remaining)	$ 353
2021	89
2022	65
2023	65
2024 and thereafter	35
Long-term Debt, Total	$ 607	$ 749

Note 10 - Equity Incentive Pl_2

Note 10 - Equity Incentive Plans (Details Textual) - shares	1 Months Ended			3 Months Ended	12 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Feb. 29, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 10, 2019
Subsequent Event [Member]
Percentage of Salaries Reductions in Reponse to COVID-19	20.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				110,595
Stock Incentive Plan 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)						3,266,661
Stock Incentive Plan 2010 [Member] | Restricted Stock [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	239,155
Stock Incentive Plan 2010 [Member] | Share-based Payment Arrangement, Tranche One [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			109,337
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 years
Stock Incentive Plan 2010 [Member] | Share-based Payment Arrangement, Tranche Two [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			1,258
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			2 years
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		1,679,947		1,679,947	190
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)		4,055
Common Stock, Capital Shares Reserved for Future Issuance (in shares)					190
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent					85.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)				0	0

Note 11 - Stock-based Compens_3

Note 11 - Stock-based Compensation (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 73 days
Restricted Stock [Member]
Share Based Compensation Arrangement by Share Based Payment Award Fair Value of Options Vested in Period	$ 0.3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 1.7

Note 11 - Stock-based Compens_4

Note 11 - Stock-based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock-based compensation	$ 172	$ 263
Stock Options Issued to Employees and Board Members [Member] | Research and Development Expense [Member]
Stock-based compensation	76	28
Stock Options Issued to Employees and Board Members [Member] | Selling, General and Administrative Expenses [Member]
Stock-based compensation	260	206
Restricted Stock [Member] | Research and Development Expense [Member]
Stock-based compensation	(79)	16
Restricted Stock [Member] | Selling, General and Administrative Expenses [Member]
Stock-based compensation	$ (85)	$ 13

Note 11 - Stock-based Compens_5

Note 11 - Stock-based Compensation - Stock Option Award Activity (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Options outstanding (in shares)	1,561
Options outstanding, weighted average exercise price (in dollars per share)	$ 928.79
Options outstanding, weighted average remaining contractual term (Year)	6 years 113 days	6 years 204 days
Granted (in shares)
Granted, weighted average exercise price (in dollars per share)
Canceled or forfeited (in shares)
Canceled or forfeited, weighted average exercise price (in dollars per share)
Exercised (in shares)
Exercised, weighted average exercise price (in dollars per share)
Options outstanding (in shares)	1,561	1,561
Options outstanding, weighted average exercise price (in dollars per share)	$ 928.79	$ 928.79
Options exercisable (in shares)	1,561
Options exercisable, weighted average exercise price (in dollars per share)	$ 928.79
Options exercisable, weighted average remaining contractual term (Year)	6 years 113 days
Options vested and expected to vest (in shares)	1,561
Options vested and expected to vest, weighted average exercise price (in dollars per share)	$ 928.79
Options vested and expected to vest, weighted average remaining contractual term (Year)	6 years 113 days

Note 11 - Stock-based Compens_6

Note 11 - Stock-based Compensation - Non-Vested Restricted Stock (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2020$ / sharesshares
Non-vested (in shares) | shares	1,308,613
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.91
Granted (in shares) | shares	110,595
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.51
Vested (in shares) | shares	(19,153)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.87
Canceled or forfeited (in shares) | shares	(6,974)
Canceled or forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.90
Non-vested (in shares) | shares	1,393,081
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.83

Note 12 - Commitments and Con_2

Note 12 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accrual for Environmental Loss Contingencies, Ending Balance	$ 0
Indemnification Agreement [Member]
Loss Contingency Accrual, Ending Balance	$ 0	$ 0

Note 13 - Fair Value Measurem_3

Note 13 - Fair Value Measurements (Details Textual) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Embedded Derivative, Fair Value of Embedded Derivative Liability	$ 0.1

Note 13 - Fair Value Measurem_4

Note 13 - Fair Value Measurements - Schedule of Carrying Value and Fair Value by Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Recurring [Member]
Liabilities, fair value	$ 101
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, fair value
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, fair value
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, fair value	101
Fair Value, Recurring [Member] | Warrant [Member]
Derivative liability, fair value	1	$ 8
Fair Value, Recurring [Member] | Warrant [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative liability, fair value
Fair Value, Recurring [Member] | Warrant [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative liability, fair value
Fair Value, Recurring [Member] | Warrant [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative liability, fair value	1	8
Fair Value, Recurring [Member] | Embedded Derivative [Member]
Derivative liability, fair value	100
Fair Value, Recurring [Member] | Embedded Derivative [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative liability, fair value
Fair Value, Recurring [Member] | Embedded Derivative [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative liability, fair value
Fair Value, Recurring [Member] | Embedded Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative liability, fair value	100
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member]
Corn and finished goods inventory, fair value	387	940
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member] | Fair Value, Inputs, Level 1 [Member]
Corn and finished goods inventory, fair value	14	267
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member] | Fair Value, Inputs, Level 2 [Member]
Corn and finished goods inventory, fair value	373	673
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member] | Fair Value, Inputs, Level 3 [Member]
Corn and finished goods inventory, fair value

Note 13 - Fair Value Measurem_5

Note 13 - Fair Value Measurements - Schedule of Fair Value Measurements Using Level 3 Inputs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Derivative Financial Instruments, Liabilities [Member]
Balance, December 31, 2019	$ 8
Issue of 2020/21 Notes embedded derivative liability
Total (gains) included in earnings	(7)
Balance, March 31, 2020	1
Embedded Derivative, 2020/21 Convertible Notes [Member]
Balance, December 31, 2019
Issue of 2020/21 Notes embedded derivative liability	2,848
Total (gains) included in earnings	(2,748)
Balance, March 31, 2020	$ 100

Note 14 - Segments (Details Tex

Note 14 - Segments (Details Textual) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Number of Operating Segments	2
Intercompany Sales	$ 0.1	$ 0.4

Note 14 - Segments - Informatio

Note 14 - Segments - Information on Business Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue from contract with Customer		$ 3,825	$ 6,403
Loss from operations		(7,976)	(5,628)
Interest expense		545	755
Depreciation and amortization		1,649	1,612
Acquisitions of plant, property and equipment		801	2,204
Total revenues		3,825	6,403
Assets	[1]	84,162		$ 93,359
UNITED STATES
Total revenues		3,750	5,664
Non-US [Member]
Total revenues		75	739
Intersegment Eliminations [Member]
Assets	[2]	(136,410)		(141,851)
Gevo [Member]
Revenue from contract with Customer		125	739
Loss from operations		(2,881)	(2,673)
Interest expense		543	755
Depreciation and amortization		56	51
Acquisitions of plant, property and equipment		10	2
Gevo [Member] | Operating Segments [Member]
Assets		80,279		91,861
Gevo Development / Agri-Energy [Member]
Revenue from contract with Customer		3,700	5,664
Loss from operations		(5,095)	(2,955)
Interest expense		2
Depreciation and amortization		1,593	1,561
Acquisitions of plant, property and equipment		791	$ 2,202
Gevo Development / Agri-Energy [Member] | Operating Segments [Member]
Assets		$ 140,293		$ 143,349
[1]	All other significant non-cash items relate to the activities of Gevo.
[2]	Includes intercompany sales of $0.1 million during the three months ended March 31, 2020 and $0.4 million for the year ended December 31, 2019 for hydrocarbon sales.