Gevo (GEVO) 10-Q 12 Nov 20 2020 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 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)		119,628,203
Entity Shell Company	false
Document Type	10-Q
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
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		Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents		$ 80,621	$ 16,302
Accounts receivable		370	1,135
Inventories		2,551	3,201
Prepaid expenses and other current assets		4,614	3,590
Total current assets		88,156	24,228
Property, plant and equipment, net		63,324	66,696
Investment in Juhl		1,500	1,500
Deposits and other assets		507	935
Total assets	[1]	153,487	93,359
Current liabilities:
Accounts payable and accrued liabilities		4,904	5,678
2020/21 Notes embedded derivative liability		29
Loans payable - other (current)		704	516
Total current liabilities		18,143	20,094
Loans payable - other (long-term)		583	233
Other long-term liabilities		172	528
Total liabilities		18,898	20,855
Commitments and Contingencies (see Note 12)
Stockholders' Equity
Common stock, $0.01 par value per share; 250,000,000 authorized; 119,578,203 and 14,083,232 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively.		1,196	141
Additional paid-in capital		613,511	530,349
Accumulated deficit		(480,118)	(457,986)
Total stockholders' equity		134,589	72,504
Total liabilities and stockholders' equity		153,487	93,359
Convertible 2020/21 Notes [Member]
Current liabilities:
Notes (current), net		$ 12,506
Convertible 2020 Notes [Member]
Current liabilities:
Notes (current), net			$ 13,900
[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	Sep. 30, 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)	119,578,203	14,083,232
Common stock, shares outstanding (in shares)	119,578,203	14,083,232

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue and cost of goods sold
Revenue from contract with Customer	$ 192	$ 6,104	$ 5,005	$ 17,565
Other revenue	70	6	116	34
Total revenues	192	6,110	5,005	17,599
Cost of goods sold	2,260	9,893	13,043	27,306
Gross loss	(2,068)	(3,783)	(8,038)	(9,707)
Operating expenses:
Research and development expense	870	1,789	2,127	3,712
Selling, general and administrative expense	3,215	2,431	8,917	6,705
Restructuring expenses	(50)		254
Total operating expenses	4,035	4,220	11,298	10,417
Loss from operations	(6,103)	(8,003)	(19,336)	(20,124)
Other income (expense):
Interest expense	(473)	(605)	(1,559)	(2,127)
(Loss) on modification of 2020 Notes			(726)
(Loss) on conversion of 2020/21 Notes to common stock	(543)		(543)
(Loss) gain from change in fair value of derivative warrant liability		(2)	8	1
Gain (loss) from change in fair value of 2020/21 Notes and 2020 Notes embedded derivative liability	247		(29)	394
Other income (expense)	36	(9)	53	11
Total other income (expense), net	(733)	(616)	(2,796)	(1,721)
Net loss	$ (6,836)	$ (8,619)	$ (22,132)	$ (21,845)
Net loss per share - basic and diluted (in dollars per share)	$ (0.09)	$ (0.66)	$ (0.62)	$ (1.87)
Weighted-average number of common shares outstanding - basic and diluted (in shares)	77,049,896	12,968,265	35,682,794	11,679,530
Ethanol Sales and Related Products [Member]
Revenue and cost of goods sold
Revenue from contract with Customer	$ 21	$ 5,554	$ 3,804	$ 16,184
Total revenues	21	5,554	3,804	16,184
Hydrocarbon [Member]
Revenue and cost of goods sold
Revenue from contract with Customer	101	550	1,085	1,381
Total revenues	$ 101	$ 550	$ 1,085	$ 1,381

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	$ 86	$ 518,027	$ (429,326)	$ 88,787
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	$ 119	527,872	(435,462)	92,529
Balance at Mar. 31, 2019	$ 119	527,872	(435,462)	92,529
Balance (in shares) at Dec. 31, 2018	8,640,583
Balance at Dec. 31, 2018	$ 86	518,027	(429,326)	88,787
Net loss				(21,845)
Balance (in shares) at Sep. 30, 2019	13,369,001
Balance	$ 133	527,958	(451,171)	76,920
Balance at Sep. 30, 2019	133	527,958	(451,171)	76,920
Balance	$ 119	527,872	(435,462)	92,529
Balance (in shares) at Mar. 31, 2019	11,885,524
Balance at Mar. 31, 2019	$ 119	527,872	(435,462)	92,529
Issuance of common stock, net of issue costs		(14)		(14)
Non-cash stock-based compensation		172		172
Net loss			(7,090)	(7,090)
Balance (in shares) at Jun. 30, 2019	11,885,524
Balance	$ 119	528,030	(442,552)	85,597
Balance at Jun. 30, 2019	119	528,030	(442,552)	85,597
Balance	119	528,030	(442,552)	85,597
Issuance of common stock, net of issue costs		(161)		(161)
Non-cash stock-based compensation		304		304
Issuance of common stock under stock plans, net of taxes (in shares)	1,483,477
Issuance of common stock under stock plans, net of taxes	$ 14	(215)		(201)
Net loss			(8,619)	(8,619)
Balance (in shares) at Sep. 30, 2019	13,369,001
Balance	$ 133	527,958	(451,171)	76,920
Balance at Sep. 30, 2019	133	527,958	(451,171)	76,920
Balance	133	527,958	(451,171)	76,920
Balance	$ 141	530,349	(457,986)	72,504
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	$ 145	531,587	(467,239)	64,493
Balance at Mar. 31, 2020	$ 145	531,587	(467,239)	64,493
Balance (in shares) at Dec. 31, 2019	14,083,232
Balance at Dec. 31, 2019	$ 141	530,349	(457,986)	72,504
Net loss				$ (22,132)
Issuance of common stock upon exercise of warrants (in shares)				52,953,400
Balance (in shares) at Sep. 30, 2020	119,578,203
Balance	$ 1,196	613,511	(480,118)	$ 72,504
Balance at Sep. 30, 2020	1,196	613,511	(480,118)	134,589
Balance	$ 145	531,587	(467,239)	64,493
Balance (in shares) at Mar. 31, 2020	14,614,890
Balance at Mar. 31, 2020	$ 145	531,587	(467,239)	64,493
Issuance of common stock, net of issue costs (in shares)	917,345
Issuance of common stock, net of issue costs	$ 9	1,238		1,247
Non-cash stock-based compensation		497		497
Issuance of common stock under stock plans, net of taxes (in shares)	(18,137)
Issuance of common stock under stock plans, net of taxes		(307)		(307)
Net loss			(6,043)	(6,043)
Balance (in shares) at Jun. 30, 2020	15,514,098
Balance	$ 154	533,015	(473,282)	59,887
Balance at Jun. 30, 2020	154	533,015	(473,282)	59,887
Balance	154	533,015	(473,282)	59,887
Non-cash stock-based compensation		642		642
Issuance of common stock under stock plans, net of taxes (in shares)	4,066,862
Issuance of common stock under stock plans, net of taxes	$ 41	(62)		(21)
Net loss			(6,836)	(6,836)
Issuance of common stock and common stock warrants, net of issue costs (in shares)	42,772,687
Issuance of common stock and common stock warrants, net of issue costs	$ 428	61,265		61,693
Issuance of common stock upon exercise of warrants (in shares)	52,953,400
Issuance of common stock upon exercise of warrants	$ 530	16,117		16,647
Issuance of common stock upon conversion of 2020/21 Notes (in shares)	4,169,426
Issuance of common stock upon conversion of 2020/21 Notes	$ 42	2,441		2,483
Issuance of common stock in exchange for services rendered (in shares)	101,730
Issuance of common stock in exchange for services rendered	$ 1	93		94
Balance (in shares) at Sep. 30, 2020	119,578,203
Balance	$ 1,196	613,511	(480,118)	59,887
Balance at Sep. 30, 2020	1,196	613,511	(480,118)	134,589
Balance	$ 1,196	$ 613,511	$ (480,118)	$ 134,589

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net loss	$ (22,132)	$ (21,845)
Adjustments to reconcile net loss to net cash used in operating activities:
(Gain) from change in fair value of derivative warrant liability	(8)	(1)
Loss (gain) from change in fair value of 2020/21 Notes and 2020 Notes embedded derivative liability	29	(394)
Loss on conversion of 2020/21 Notes to common stock	543
Loss (gain) on retirement of property, plant and equipment	38	(19)
Stock-based compensation	1,347	938
Depreciation and amortization	4,754	4,849
Non-cash lease expense	45	25
Non-cash interest expense	606	1,089
Other non-cash expense		1
Changes in operating assets and liabilities:
Accounts receivable	765	148
Inventories	650	204
Prepaid expenses and other current assets, deposits and other assets	(613)	(23)
Accounts payable, accrued expenses and long-term liabilities	(605)	230
Net cash used in operating activities	(14,581)	(14,798)
Investing Activities
Acquisitions of property, plant and equipment	(1,756)	(5,779)
Proceeds from sale of property, plant and equipment		19
Investment in Juhl		(1,500)
Net cash used in investing activities	(1,756)	(7,260)
Financing Activities
Proceeds from SBA loans	1,006
Debt and equity offering costs	(6,170)	(178)
Proceeds from issuance of common stock and common stock warrants	69,985	9,647
Proceeds from exercise of warrants	16,647
Net settlement of common stock under stock plans	(331)	(201)
Payment of loans payable - other	(481)
Net cash provided by financing activities	80,656	9,268
Net increase (decrease) in cash and cash equivalents	64,319	(12,790)
us-gaap_CashAndCashEquivalentsAbstract
Beginning of period	16,302	33,734
End of period	80,621	20,944
Supplemental disclosures of cash and non-cash investing and financing transactions
Cash paid for interest	953	1,038
Non-cash purchase of property, plant and equipment	2	41
Issuance of common stock upon exchange of debt and make-whole	2,517
Issuance of common stock in exchange for services rendered	94
Original issue discount paid with 2020/21 Notes	282
Right-of-use asset purchased with financing lease	$ 13

Note 1 - Nature of Business, Fi

Note 1 - Nature of Business, Financial Condition and Basis of Presentation	9 Months Ended
	Sep. 30, 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 uses low-carbon, renewable resource-based raw materials as feedstock. 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 isobutanol and 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 Company expects that the impact of the COVID- 19 2020 first 2020 19 third 2020 97% 2019. 2020. With many of the Company's employees working remotely, the Company faces the risk that unusual working arrangements could impact the effectiveness of its operations or controls. A potential COVID- 19 19 There is also a risk that the COVID- 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 ended September 30, 2020 19 may not September 30, 2020. may may 19 In response to the impact of the COVID- 19 20% April 1, 2020 July 31, 2020. 20% 20% 20% July 31, 2020, 20% New Contracts. April 4, 2019, April 1, 2018 ( April 1, 2018. August 13, 2020, Pursuant to the licenses granted by the Company to Praj under the MFA, Praj has exclusive rights to cause the Company to enter into negotiations with third no The Company will receive certain finder's fees as set forth in the MFA to the extent one third not not 10 one 30 five million fifth On August 14, 2020, 10 If the Company does not December 31, 2020, may not Subject to the satisfaction or waiver of all of the Conditions Precedent, the Company is required to use commercially reasonable efforts to cause the “Commercial Operations Date” to occur on or before December 31, 2023. 85% not December 31, 2023 ( may Restructuring Expenses. first 2020, 19 March 2020, 26 four one one The Company incurred $0.1 $0.2 no nine September 30, 2020, Restructuring expenses $0.02 $0.3 nine September 30, 2020. 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 September 30, 2020, "Accounts payable and accrued liabilities December 31, 2019 Additions Payments September 30, 2020 Severance (including payroll taxes) $ — $ 96 $ (96 ) $ — Lease agreements — 158 (158 ) — Total $ — $ 254 $ (254) $ — Financial Condition September 30, 2020. September 30, 2020 $80.6 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 no July 2020 July 6, 2020, “July 2020 20,896,666 1 1 $0.60 1 9,103,334 2 2 $0.59 2 July 2020 1 September 30, 2020. Each Series 1 one one 2020 one 2020 2 2020 one 2020 2020 one 2020 2020 five $0.60 2020 $0.01 2020 July 2020 2020 30,000,000 September 30, 2020, 2020 The net proceeds to the Company from the July 2020 $16.1 not July 2020 During the three September 30, 2020, 2020 27,317,834 $16.4 2020 2,682,166 $0.60 August 2020 August 25, 2020, 21,929,313 $1.30 16,532,232 2020 one 2020 $1.29 2020 “August 2020 2020 $0.01 2020 September 30, 2020, 2020 The net proceeds to the Company from the August 2020 $45.8 not August 2020 The Company evaluated the Series 2020 2020 2020 480, Distinguishing Liabilities from Equity 2020 2020 2020 The Warrants are classified as component of permanent equity because they are freestanding financial instruments that are legally detachable and separately exercisable from the shares of common stock with which they were issued, are immediately exercisable, do not not 2020 2020 2020 2020 2020 2020 $8.3 $2.9 $21.4 130% 141%, 0.30% 0.31% five Conversion of 2020/21 July 10, 2020, 2020/21 $2.0 2020/21 $0.3 4,169,426 2020/21 Loss on conversion of 2020/21 $0.5 At-the-Market Offering Program. February 2018, August 2019, $10.7 During the nine September 30, 2020, 1,343,121 $2.2 No three September 30, 2020. As of September 30, 2020, $6.5 Basis of Presentation. not y at September 30 , 2020 not 8 10 December 31, 2019. Income Taxes. no Concentration of Business Risk. September 30, 2020, four 27%, 20%, 14% 12% December 31, 2019, three 57%, 13% 15% For the three September 30, 2020, 52% 39% three September 30, 2019, 73% 16% nine September 30, 2020, 57%, 17% 15% nine September 30, 2019, 73% 16% 14 Related Party Transaction. nine September 30, 2020, $0.1 no September 30, 2020.

Note 2 - Earnings Per Share

Note 2 - Earnings Per Share	9 Months Ended
	Sep. 30, 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 nine September 30 , 2020 2019 The following table sets forth securities outstanding that could potentially dilute the calculation of diluted earnings per share: Three and Nine Months ended September 30, 2020 2019 Warrants to purchase common stock - liability classified 52,032 54,989 Warrant to purchase common stock - equity classified 2,682,166 — Conversion of 2020/21 Notes 5,789,209 — Conversion of 2020 Notes — 997,914 Outstanding options to purchase common stock 1,552 1,564 Stock appreciation rights 132,566 132,566 Total 8,657,525 1,187,033

Note 3 - Revenues From Contract

Note 3 - Revenues From Contracts With Customers and Other Revenues	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	3. Revenues from Contracts with Customers and 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 September 30, 2020 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 21 $ — $ 21 Hydrocarbon revenue 101 — 101 Other revenue 70 — 70 $ 192 $ — $ 192 Timing of Revenue Recognition Goods transferred at a point in time $ 122 $ — $ 122 Services transferred over time 70 — 70 $ 192 $ — $ 192 Three Months Ended September 30, 2019 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 5,554 $ — $ 5,554 Hydrocarbon revenue 550 — 550 Other revenue — 6 6 $ 6,104 $ 6 $ 6,110 Timing of Revenue Recognition Goods transferred at a point in time $ 6,104 $ — $ 6,104 Services transferred over time — 6 6 $ 6,104 $ 6 $ 6,110 Nine Months Ended September 30, 2020 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 3,804 $ — $ 3,804 Hydrocarbon revenue 1,085 — 1,085 Other revenue 116 — 116 $ 5,005 $ — $ 5,005 Timing of Revenue Recognition Goods transferred at a point in time $ 4,889 $ — $ 4,889 Services transferred over time 116 — 116 $ 5,005 $ — $ 5,005 Nine Months Ended September 30, 2019 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 16,184 — $ 16,184 Hydrocarbon revenue 1,381 — 1,381 Other revenue — 34 34 $ 17,565 $ 34 $ 17,599 Timing of Revenue Recognition Goods transferred at a point in time $ 17,565 $ — $ 17,565 Services transferred over time — 34 34 $ 17,565 $ 34 $ 17,599 Goods transferred at a point-in-time. three nine September 30, 2020 2019, no September 30, 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 nine September 30, 2020 2019, no September 30, 2020 December 31, 2019, no Contract Assets and Trade Receivables. September 30, 2020 December 31, 2019, no not no September 30, 2020 December 31, 2019. not September 30, 2020 December 31, 2019.

Note 4 - Leases, Right-to-use A

Note 4 - Leases, Right-to-use Assets and Related Liabilities	9 Months Ended
	Sep. 30, 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 is one not September 30, 2020 $2.0 September 30, 2020. two not December 31, 2019 $3.0 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 September 30, 2020 2019 Lease Cost Financing lease cost $ 1 $ — Operating lease cost 11 435 Short-Term lease cost 376 110 Variable lease cost 36 21 Total lease cost $ 424 $ 566 Nine Months Ended September 30, 2020 2019 Lease Cost Financing lease cost $ 3 $ — Operating lease cost 545 1,166 Short-Term lease cost 556 315 Variable lease cost 108 86 Total lease cost $ 1,212 $ 1,567 Other Information Cash paid for the measurement of lease liabilities: Operating cash flows from finance lease $ 2 $ — Operating cash flows from operating leases 545 1,166 Finance cash flows from finance lease 1 — Right-to-use asset obtained in exchange for new financing lease liability 13 — Weighted-average remaining lease term, financing lease (months) 53 — Weighted-average remaining lease term, operating leases (months) 10 22 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 September 30, 2020 ( Year Ending December 31, Financing Leases Operating Leases 2020 (remaining) $ 1 77 2021 4 180 2022 4 — 2023 4 — 2024 and thereafter 5 — Total 18 257 Less: Amounts representing present value discounts (6 ) (10 ) Total lease liabilities 12 247

Note 5 - Inventories

Note 5 - Inventories	9 Months Ended
	Sep. 30, 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): September 30, December 31, 2020 2019 Raw materials Corn $ — $ 267 Enzymes and other inputs 136 184 Finished goods Jet Fuels, Isooctane and Isooctene 881 571 Isobutanol — 135 Ethanol — 93 Distiller's grains — 54 Work in process Agri-Energy — 254 Gevo 29 122 Spare parts 1,505 1,521 Total inventories $ 2,551 $ 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	9 Months Ended
	Sep. 30, 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 September 30, December 31, (in years) 2020 2019 Luverne retrofit asset 20 $ 70,820 $ 70,820 Plant machinery and equipment 10 17,374 17,413 Site improvements 10 7,157 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 2,021 2,034 Construction in progress 8,909 7,710 Total property, plant and equipment 121,340 120,087 Less accumulated depreciation and amortization (58,016 ) (53,391 ) Property, plant and equipment, net $ 63,324 $ 66,696 The Company recorded depreciation and amortization expense related to property, plant and equipment as follows (in thousands): Three Months Ended September 30 2020 2019 Cost of goods sold $ 1,418 $ 1,578 Operating expenses 52 30 Total depreciation and amortization $ 1,470 $ 1,608 Nine Months Ended September 30 2020 2019 Cost of goods sold $ 4,580 $ 4,697 Operating expenses 158 92 Total depreciation and amortization $ 4,738 $ 4,789

Note 7 - Embedded Derivatives L

Note 7 - Embedded Derivatives Liabilities	9 Months Ended
	Sep. 30, 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 September 30 , 2020 December 31, 2019, $0.03 $0, 2020/21 2020 $0.2 $0.03 2020/21 three nine September 30 , 2020, $0 $0.4 2020 three nine September 30 , 2019, The following table sets forth the inputs to the lattice models that were used to value the embedded derivatives: September 30, December 31, 2020 2019 Stock price $ 1.00 $ 2.31 Conversion Rate per $1,000 409.50 67.95 Conversion Price $ 2.44 $ 14.72 Maturity date December 31, 2020 March 15, 2020 Risk-free interest rate 0.10 % 1.52 % Estimated stock volatility 247 % 60 % Estimated credit spread 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 Derivative Warrant Liability The following warrants were sold by the Company during the nine September 30, 2020: • In July 2020, 2020 30,000,000 2020 9,103,334 • In August 2020, 2020 16,532,232 The following table sets forth information pertaining to shares issued upon the exercise of such warrants as of September 30, 2020: Issuance Date Expiration Date Exercise Price as of September 30, 2020 Shares Underlying Warrants on Issuance Date Shares Issued upon Warrant Exercises as of September 30, 2020 Shares Underlying Warrants Outstanding as of September 30, 2020 Series D Warrants 12/11/2015 12/11/2020 $ 40.00 25,125 25,078 47 Series F Warrants 04/01/2016 04/01/2021 $ 40.00 25,733 11,692 14,041 Series I Warrants 09/13/2016 09/13/2021 $ 220.00 35,368 — 35,368 Series K Warrants 02/17/2017 2/17/2022 $ 2.00 311,236 308,660 2,576 Series 2020-A Warrants (1) 7/6/2020 7/6/2025 $ 0.60 30,000,000 27,317,834 2,682,166 Series 2020-B Warrants (1) 7/6/2020 7/6/2025 $ 0.01 9,103,334 9,103,334 — Series 2020-C Warrants (1) 8/25/2020 8/25/2025 $ 0.01 16,532,232 16,532,232 — 56,033,028 53,298,830 2,734,198 ( 1 2020 2020 2020 The agreements governing the above warrants include the following terms: • certain warrants have exercise prices which are subject to adjustment for certain events, including the issuance of stock dividends on the Company's common stock and, in certain instances, the issuance of the Company's common stock or instruments convertible into the Company's common stock at a price per share less than the exercise price of the respective warrants; • warrant holders may not may • the exercise price and the number and type of securities purchasable upon exercise of the warrants are subject to adjustment upon certain corporate events, including certain combinations, consolidations, liquidations, mergers, recapitalizations, reclassifications, reorganizations, stock dividends and stock splits, a sale of all or substantially all of the Company's assets and certain other events; and • in the event of an “extraordinary transaction” or a “fundamental transaction” (as such terms are defined in the respective warrant agreements), generally including any merger with or into another entity, sale of all or substantially all of the Company's assets, tender offer or exchange offer, or reclassification of its common stock, in which the successor entity (as defined in the respective warrant agreements) that assumes the successor entity is not 30 may During the three September 30, 2020, Common Stock Issued Proceeds Series 2020-A Warrants 27,317,834 $ 16,391 Series 2020-B Warrants 9,103,334 91 Series 2020-C Warrants 16,532,232 165 52,953,400 $ 16,647

Note 8 - Accounts Payable and A

Note 8 - Accounts Payable and Accrued Liabilities	9 Months Ended
	Sep. 30, 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): September 30, December 31, 2020 2019 Accrued utilities and supplies $ 712 $ 645 Accounts payable - trade 1,441 1,474 Accrued employee compensation 1,593 1,946 Other accrued liabilities 1,158 1,613 Total accounts payable and accrued liabilities $ 4,904 $ 5,678

Note 9 - Debt

Note 9 - Debt	9 Months Ended
	Sep. 30, 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 — — 270 — 270 — 270 Amortization of debt issue costs — — — 20 20 — 20 Paid-in-kind interest 47 269 — — 316 — 316 Exchange of 2020 Notes for 2020/21 Notes (14,100 ) 14,100 — — — — — Original issue discount paid with 2020/21 Notes — 282 (282 ) — — — — Conversion of 2020/21 Notes into common stock — (2,000 ) — — (2,000 ) — (2,000 ) Fair value of 2020/21 embedded derivative — — — — — 2,848 2,848 Change in fair value of 2020/21 Notes embedded derivative — — — — — (2,819 ) (2,819 ) Balance - September 30, 2020 $ — $ 12,651 $ (135 ) $ (10 ) $ 12,506 $ 29 $ 12,535 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 June 3, 2020. 2020/21 July 3, 2020. January 10, 2020, 2020/21 2020 “2020/21 April 7, 2020 ( July 2, 2020 ( August 24, 2020 ( “2020/21 2020/21 $0.7 (Loss) on modification of 2020 The 2020/21 December 31, 2020, April 1, 2021 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 June 3, 2020 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 Conversion of 2020/21 On July 10, 2020, 2020/21 $2.0 2020/21 $0.3 4,169,426 2020/21 Loss on conversion of 2020/21 $0.5 Loans Payable - Other During the first 2020, fourth 2019, 4% 21%, $0.1 August 2020 February 2025. In April 2020, $1.0 April 2022 1% August 2021 August 5, 2021, $0.06 24 The balance of these loans at September 30, 2020 December 31, 2019 September 30 December 31, 2019 SBA Loans $ 1,006 $ — Equipment 281 321 Insurance — 428 Total notes payable - other 1,287 749 Less current portion (704 ) (516 ) Long-term portion $ 583 $ 233 Future payments for Loans Payable - Other are as follows (in thousands): Year ending December 31, 2020 (remaining) $ 134 2021 763 2022 290 2023 65 2024 and thereafter 35 $ 1,287

Note 10 - Equity Incentive Plan

Note 10 - Equity Incentive Plans	9 Months Ended
	Sep. 30, 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 June 3, 2020, 2010 3,713,413 6,980,074 Restricted common stock activity during the nine September 30, 2020 • In February 2020, 109,337 three 1,258 two February 27, 2020. • In March 2020, 4,055 • In April 2020, 239,155 April 1, 2020 20% 1, May 15, 2020. April 2020, 29,032 • During the three June 30, 2020, 77,768 • During July 2020, 115,156 July 1, 2020 20% July 31, 2020. 3,989,140 101,730 two • During the three September 30, 2020, 245,990 At September 30, 2020, 1,242,905 2010 Employee Stock Purchase Plan February 2011, January 1 June 30 July 1 December 31 190 190 June 30, 2020 85% first no nine September 30, 2020 2019.

Note 11 - Stock-based Compensat

Note 11 - Stock-based Compensation	9 Months Ended
	Sep. 30, 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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Restricted stock Research and development $ 142 $ 68 $ 353 $ 129 Selling, general and administrative 500 236 1,122 581 Stock appreciation rights Research and development 16 132 (61 ) 114 Selling, general and administrative 16 132 (67 ) 114 Total stock-based compensation $ 674 $ 568 $ 1,347 $ 938 Stock Option Award Activity September 30, 2020 three September 30, 2020 Weighted- Average Weighted- Remaining Average Contractual Aggregate Number of Exercise Term Intrinsic Options Price (1) (years) Value Options outstanding at December 31, 2019 1,561 $ 928.79 6.56 $ — Granted — $ — Canceled or forfeited (9 ) $ 72,891.04 Exercised — $ — Options outstanding at September 30, 2020 1,552 $ 556.13 5.83 $ — Options exercisable at September 30, 2020 1,552 $ 556.13 5.83 $ — Options vested and expected to vest at September 30, 2020 1,552 $ 556.13 5.83 $ — ( 1 $20.00 $99,300.00 September 30, 2020. Restricted Stock September 30, 2020 three September 30, 2020 Weighted- Average Number of Grant-Date Shares Fair Value Non-vested at December 31, 2019 1,308,613 $ 1.91 Granted 4,454,046 $ 0.63 Vested (1,015,336 ) $ 1.47 Canceled or forfeited (6,974 ) $ 1.90 Non-vested at September 30, 2020 4,740,349 $ 0.80 The total fair value of restricted stock that vested during the nine September 30, 2020 $1.5 September 30, 2020, $3.1 1.6

Note 12 - Commitments and Conti

Note 12 - Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	12. Commitments and Contingencies Legal Matters may not not Indemnifications may September 30, 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 September 30, 2020.

Note 13 - Fair Value Measuremen

Note 13 - Fair Value Measurements	9 Months Ended
	Sep. 30, 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 September 30 , 2020 December 31, 2019, Fair Value Measurements at September 30, 2020 (In thousands) Fair Value at September 30, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring: 2020/21 Notes Embedded Derivative Liability $ 29 $ — $ — $ 29 Nonrecurring Corn and finished goods inventory $ 599 $ — $ 599 $ — 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 September 30 , 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 (8 ) (2,819 ) Balance, September 30, 2020 $ — $ 29 There were no 3 three September 30, 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 $0.03 September 30, 2020 3 Change in fair value of 2020/21 ” in the consolidated Statements 7, Embedded Derivatives Derivative Warrant Liability 3 3 $0 $.01 September 30, 2020 December 31, 2019, 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	9 Months Ended
	Sep. 30, 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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Revenues: Gevo $ 176 $ 550 $ 1,198 $ 1,381 Gevo Development / Agri-Energy 16 5,560 3,807 16,218 Consolidated $ 192 $ 6,110 $ 5,005 $ 17,599 Loss from operations: Gevo $ (3,831 ) $ (3,830 ) $ (9,896 ) $ (9,463 ) Gevo Development / Agri-Energy (2,272 ) (4,173 ) (9,440 ) (10,661 ) Consolidated $ (6,103 ) $ (8,003 ) $ (19,336 ) $ (20,124 ) Interest expense: Gevo $ 465 $ 605 $ 1,546 $ 2,127 Gevo Development / Agri-Energy 8 — 13 — Consolidated $ 473 $ 605 $ 1,559 $ 2,127 Depreciation and amortization expense: Gevo $ 53 $ 50 $ 159 $ 152 Gevo Development / Agri-Energy 1,423 1,578 4,595 4,697 Consolidated $ 1,476 $ 1,628 $ 4,754 $ 4,849 Acquisitions of plant, property and equipment: Gevo $ — $ — $ 79 $ 62 Gevo Development / Agri-Energy 106 781 1,325 4,862 Consolidated $ 106 $ 781 $ 1,404 $ 4,924 Revenue by geographic area United States $ 12 $ 5,560 $ 3,853 $ 16,218 Other 180 550 1,152 1,381 Consolidated $ 192 $ 6,110 $ 5,005 $ 17,599 September 30 December 31, 2020 2019 Total assets Gevo $ 152,762 $ 91,861 Gevo Development / Agri-Energy 133,790 143,349 Intercompany eliminations (1) (133,065 ) (141,851 ) Consolidated (2) $ 153,487 $ 93,359 ( 1 Includes intercompany sales of $0.1 nine September 30, 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)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Nature of Business [Policy Text Block]	Nature of Business zero Gevo uses low-carbon, renewable resource-based raw materials as feedstock. 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 isobutanol and 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 Company expects that the impact of the COVID- 19 2020 first 2020 19 third 2020 97% 2019. 2020. With many of the Company's employees working remotely, the Company faces the risk that unusual working arrangements could impact the effectiveness of its operations or controls. A potential COVID- 19 19 There is also a risk that the COVID- 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 ended September 30, 2020 19 may not September 30, 2020. may may 19 In response to the impact of the COVID- 19 20% April 1, 2020 July 31, 2020. 20% 20% 20% July 31, 2020, 20% New Contracts. April 4, 2019, April 1, 2018 ( April 1, 2018. August 13, 2020, Pursuant to the licenses granted by the Company to Praj under the MFA, Praj has exclusive rights to cause the Company to enter into negotiations with third no The Company will receive certain finder's fees as set forth in the MFA to the extent one third not not 10 one 30 five million fifth On August 14, 2020, 10 If the Company does not December 31, 2020, may not Subject to the satisfaction or waiver of all of the Conditions Precedent, the Company is required to use commercially reasonable efforts to cause the “Commercial Operations Date” to occur on or before December 31, 2023. 85% not December 31, 2023 ( may
Costs Associated with Exit or Disposal Activity or Restructuring [Policy Text Block]	Restructuring Expenses. first 2020, 19 March 2020, 26 four one one The Company incurred $0.1 $0.2 no nine September 30, 2020, Restructuring expenses $0.02 $0.3 nine September 30, 2020. 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 September 30, 2020, "Accounts payable and accrued liabilities December 31, 2019 Additions Payments September 30, 2020 Severance (including payroll taxes) $ — $ 96 $ (96 ) $ — Lease agreements — 158 (158 ) — Total $ — $ 254 $ (254) $ —
Financial Condition [Policy Text Block]	Financial Condition September 30, 2020. September 30, 2020 $80.6 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 no
Stockholders' Equity, Policy [Policy Text Block]	July 2020 July 6, 2020, “July 2020 20,896,666 1 1 $0.60 1 9,103,334 2 2 $0.59 2 July 2020 1 September 30, 2020. Each Series 1 one one 2020 one 2020 2 2020 one 2020 2020 one 2020 2020 five $0.60 2020 $0.01 2020 July 2020 2020 30,000,000 September 30, 2020, 2020 The net proceeds to the Company from the July 2020 $16.1 not July 2020 During the three September 30, 2020, 2020 27,317,834 $16.4 2020 2,682,166 $0.60 August 2020 August 25, 2020, 21,929,313 $1.30 16,532,232 2020 one 2020 $1.29 2020 “August 2020 2020 $0.01 2020 September 30, 2020, 2020 The net proceeds to the Company from the August 2020 $45.8 not August 2020 The Company evaluated the Series 2020 2020 2020 480, Distinguishing Liabilities from Equity 2020 2020 2020 The Warrants are classified as component of permanent equity because they are freestanding financial instruments that are legally detachable and separately exercisable from the shares of common stock with which they were issued, are immediately exercisable, do not not 2020 2020 2020 2020 2020 2020 $8.3 $2.9 $21.4 130% 141%, 0.30% 0.31% five Conversion of 2020/21 July 10, 2020, 2020/21 $2.0 2020/21 $0.3 4,169,426 2020/21 Loss on conversion of 2020/21 $0.5 At-the-Market Offering Program. February 2018, August 2019, $10.7 During the nine September 30, 2020, 1,343,121 $2.2 No three September 30, 2020. As of September 30, 2020, $6.5
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation. not y at September 30 , 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. September 30, 2020, four 27%, 20%, 14% 12% December 31, 2019, three 57%, 13% 15% For the three September 30, 2020, 52% 39% three September 30, 2019, 73% 16% nine September 30, 2020, 57%, 17% 15% nine September 30, 2019, 73% 16% 14
Related Party Transactions Policy [Policy Text Block]	Related Party Transaction. nine September 30, 2020, $0.1 no September 30, 2020.

Note 1 - Nature of Business, _2

Note 1 - Nature of Business, Financial Condition and Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	December 31, 2019 Additions Payments September 30, 2020 Severance (including payroll taxes) $ — $ 96 $ (96 ) $ — Lease agreements — 158 (158 ) — Total $ — $ 254 $ (254) $ —

Note 2 - Earnings Per Share (Ta

Note 2 - Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Three and Nine Months ended September 30, 2020 2019 Warrants to purchase common stock - liability classified 52,032 54,989 Warrant to purchase common stock - equity classified 2,682,166 — Conversion of 2020/21 Notes 5,789,209 — Conversion of 2020 Notes — 997,914 Outstanding options to purchase common stock 1,552 1,564 Stock appreciation rights 132,566 132,566 Total 8,657,525 1,187,033

Note 3 - Revenues From Contra_2

Note 3 - Revenues From Contracts With Customers and Other Revenues (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three Months Ended September 30, 2020 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 21 $ — $ 21 Hydrocarbon revenue 101 — 101 Other revenue 70 — 70 $ 192 $ — $ 192 Timing of Revenue Recognition Goods transferred at a point in time $ 122 $ — $ 122 Services transferred over time 70 — 70 $ 192 $ — $ 192 Three Months Ended September 30, 2019 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 5,554 $ — $ 5,554 Hydrocarbon revenue 550 — 550 Other revenue — 6 6 $ 6,104 $ 6 $ 6,110 Timing of Revenue Recognition Goods transferred at a point in time $ 6,104 $ — $ 6,104 Services transferred over time — 6 6 $ 6,104 $ 6 $ 6,110 Nine Months Ended September 30, 2020 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 3,804 $ — $ 3,804 Hydrocarbon revenue 1,085 — 1,085 Other revenue 116 — 116 $ 5,005 $ — $ 5,005 Timing of Revenue Recognition Goods transferred at a point in time $ 4,889 $ — $ 4,889 Services transferred over time 116 — 116 $ 5,005 $ — $ 5,005 Nine Months Ended September 30, 2019 Major Goods/Service Line Revenues from Contracts with Customers Other Revenues Total Ethanol sales and related products, net $ 16,184 — $ 16,184 Hydrocarbon revenue 1,381 — 1,381 Other revenue — 34 34 $ 17,565 $ 34 $ 17,599 Timing of Revenue Recognition Goods transferred at a point in time $ 17,565 $ — $ 17,565 Services transferred over time — 34 34 $ 17,565 $ 34 $ 17,599

Note 4 - Leases, Right-to-use_2

Note 4 - Leases, Right-to-use Assets and Related Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Lease, Cost [Table Text Block]	Three Months Ended September 30, 2020 2019 Lease Cost Financing lease cost $ 1 $ — Operating lease cost 11 435 Short-Term lease cost 376 110 Variable lease cost 36 21 Total lease cost $ 424 $ 566 Nine Months Ended September 30, 2020 2019 Lease Cost Financing lease cost $ 3 $ — Operating lease cost 545 1,166 Short-Term lease cost 556 315 Variable lease cost 108 86 Total lease cost $ 1,212 $ 1,567 Other Information Cash paid for the measurement of lease liabilities: Operating cash flows from finance lease $ 2 $ — Operating cash flows from operating leases 545 1,166 Finance cash flows from finance lease 1 — Right-to-use asset obtained in exchange for new financing lease liability 13 — Weighted-average remaining lease term, financing lease (months) 53 — Weighted-average remaining lease term, operating leases (months) 10 22 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) $ 1 77 2021 4 180 2022 4 — 2023 4 — 2024 and thereafter 5 — Total 18 257 Less: Amounts representing present value discounts (6 ) (10 ) Total lease liabilities 12 247

Note 5 - Inventories (Tables)

Note 5 - Inventories (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Inventory, Current [Table Text Block]	September 30, December 31, 2020 2019 Raw materials Corn $ — $ 267 Enzymes and other inputs 136 184 Finished goods Jet Fuels, Isooctane and Isooctene 881 571 Isobutanol — 135 Ethanol — 93 Distiller's grains — 54 Work in process Agri-Energy — 254 Gevo 29 122 Spare parts 1,505 1,521 Total inventories $ 2,551 $ 3,201

Note 6 - Property, Plant and _2

Note 6 - Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Property, Plant and Equipment [Table Text Block]	Useful Life September 30, December 31, (in years) 2020 2019 Luverne retrofit asset 20 $ 70,820 $ 70,820 Plant machinery and equipment 10 17,374 17,413 Site improvements 10 7,157 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 2,021 2,034 Construction in progress 8,909 7,710 Total property, plant and equipment 121,340 120,087 Less accumulated depreciation and amortization (58,016 ) (53,391 ) Property, plant and equipment, net $ 63,324 $ 66,696
Schedule of Depreciation and Amortization Expense [Table Text Block]	Three Months Ended September 30 2020 2019 Cost of goods sold $ 1,418 $ 1,578 Operating expenses 52 30 Total depreciation and amortization $ 1,470 $ 1,608 Nine Months Ended September 30 2020 2019 Cost of goods sold $ 4,580 $ 4,697 Operating expenses 158 92 Total depreciation and amortization $ 4,738 $ 4,789

Note 7 - Embedded Derivatives_2

Note 7 - Embedded Derivatives Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Defined Benefit Plan, Assumptions [Table Text Block]	September 30, December 31, 2020 2019 Stock price $ 1.00 $ 2.31 Conversion Rate per $1,000 409.50 67.95 Conversion Price $ 2.44 $ 14.72 Maturity date December 31, 2020 March 15, 2020 Risk-free interest rate 0.10 % 1.52 % Estimated stock volatility 247 % 60 % Estimated credit spread 36 % 27 %
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	Issuance Date Expiration Date Exercise Price as of September 30, 2020 Shares Underlying Warrants on Issuance Date Shares Issued upon Warrant Exercises as of September 30, 2020 Shares Underlying Warrants Outstanding as of September 30, 2020 Series D Warrants 12/11/2015 12/11/2020 $ 40.00 25,125 25,078 47 Series F Warrants 04/01/2016 04/01/2021 $ 40.00 25,733 11,692 14,041 Series I Warrants 09/13/2016 09/13/2021 $ 220.00 35,368 — 35,368 Series K Warrants 02/17/2017 2/17/2022 $ 2.00 311,236 308,660 2,576 Series 2020-A Warrants (1) 7/6/2020 7/6/2025 $ 0.60 30,000,000 27,317,834 2,682,166 Series 2020-B Warrants (1) 7/6/2020 7/6/2025 $ 0.01 9,103,334 9,103,334 — Series 2020-C Warrants (1) 8/25/2020 8/25/2025 $ 0.01 16,532,232 16,532,232 — 56,033,028 53,298,830 2,734,198
Exercise of Warrants [Table Text Block]	Common Stock Issued Proceeds Series 2020-A Warrants 27,317,834 $ 16,391 Series 2020-B Warrants 9,103,334 91 Series 2020-C Warrants 16,532,232 165 52,953,400 $ 16,647

Note 8 - Accounts Payable and_2

Note 8 - Accounts Payable and Accrued Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	September 30, December 31, 2020 2019 Accrued utilities and supplies $ 712 $ 645 Accounts payable - trade 1,441 1,474 Accrued employee compensation 1,593 1,946 Other accrued liabilities 1,158 1,613 Total accounts payable and accrued liabilities $ 4,904 $ 5,678

Note 9 - Debt (Tables)

Note 9 - Debt (Tables)	9 Months Ended
	Sep. 30, 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 — — 270 — 270 — 270 Amortization of debt issue costs — — — 20 20 — 20 Paid-in-kind interest 47 269 — — 316 — 316 Exchange of 2020 Notes for 2020/21 Notes (14,100 ) 14,100 — — — — — Original issue discount paid with 2020/21 Notes — 282 (282 ) — — — — Conversion of 2020/21 Notes into common stock — (2,000 ) — — (2,000 ) — (2,000 ) Fair value of 2020/21 embedded derivative — — — — — 2,848 2,848 Change in fair value of 2020/21 Notes embedded derivative — — — — — (2,819 ) (2,819 ) Balance - September 30, 2020 $ — $ 12,651 $ (135 ) $ (10 ) $ 12,506 $ 29 $ 12,535
Schedule of Long-term Debt Instruments [Table Text Block]	September 30 December 31, 2019 SBA Loans $ 1,006 $ — Equipment 281 321 Insurance — 428 Total notes payable - other 1,287 749 Less current portion (704 ) (516 ) Long-term portion $ 583 $ 233
Schedule of Maturities of Long-term Debt [Table Text Block]	Year ending December 31, 2020 (remaining) $ 134 2021 763 2022 290 2023 65 2024 and thereafter 35 $ 1,287

Note 11 - Stock-based Compens_2

Note 11 - Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Share-based Payment Arrangement, Cost by Plan [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Restricted stock Research and development $ 142 $ 68 $ 353 $ 129 Selling, general and administrative 500 236 1,122 581 Stock appreciation rights Research and development 16 132 (61 ) 114 Selling, general and administrative 16 132 (67 ) 114 Total stock-based compensation $ 674 $ 568 $ 1,347 $ 938
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Weighted- Remaining Average Contractual Aggregate Number of Exercise Term Intrinsic Options Price (1) (years) Value Options outstanding at December 31, 2019 1,561 $ 928.79 6.56 $ — Granted — $ — Canceled or forfeited (9 ) $ 72,891.04 Exercised — $ — Options outstanding at September 30, 2020 1,552 $ 556.13 5.83 $ — Options exercisable at September 30, 2020 1,552 $ 556.13 5.83 $ — Options vested and expected to vest at September 30, 2020 1,552 $ 556.13 5.83 $ —
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 4,454,046 $ 0.63 Vested (1,015,336 ) $ 1.47 Canceled or forfeited (6,974 ) $ 1.90 Non-vested at September 30, 2020 4,740,349 $ 0.80

Note 13 - Fair Value Measurem_2

Note 13 - Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	Fair Value Measurements at September 30, 2020 (In thousands) Fair Value at September 30, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring: 2020/21 Notes Embedded Derivative Liability $ 29 $ — $ — $ 29 Nonrecurring Corn and finished goods inventory $ 599 $ — $ 599 $ — 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 (8 ) (2,819 ) Balance, September 30, 2020 $ — $ 29

Note 14 - Segments (Tables)

Note 14 - Segments (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Revenues: Gevo $ 176 $ 550 $ 1,198 $ 1,381 Gevo Development / Agri-Energy 16 5,560 3,807 16,218 Consolidated $ 192 $ 6,110 $ 5,005 $ 17,599 Loss from operations: Gevo $ (3,831 ) $ (3,830 ) $ (9,896 ) $ (9,463 ) Gevo Development / Agri-Energy (2,272 ) (4,173 ) (9,440 ) (10,661 ) Consolidated $ (6,103 ) $ (8,003 ) $ (19,336 ) $ (20,124 ) Interest expense: Gevo $ 465 $ 605 $ 1,546 $ 2,127 Gevo Development / Agri-Energy 8 — 13 — Consolidated $ 473 $ 605 $ 1,559 $ 2,127 Depreciation and amortization expense: Gevo $ 53 $ 50 $ 159 $ 152 Gevo Development / Agri-Energy 1,423 1,578 4,595 4,697 Consolidated $ 1,476 $ 1,628 $ 4,754 $ 4,849 Acquisitions of plant, property and equipment: Gevo $ — $ — $ 79 $ 62 Gevo Development / Agri-Energy 106 781 1,325 4,862 Consolidated $ 106 $ 781 $ 1,404 $ 4,924 Revenue by geographic area United States $ 12 $ 5,560 $ 3,853 $ 16,218 Other 180 550 1,152 1,381 Consolidated $ 192 $ 6,110 $ 5,005 $ 17,599 September 30 December 31, 2020 2019 Total assets Gevo $ 152,762 $ 91,861 Gevo Development / Agri-Energy 133,790 143,349 Intercompany eliminations (1) (133,065 ) (141,851 ) Consolidated (2) $ 153,487 $ 93,359

Note 1 - Nature of Business, _3

Note 1 - Nature of Business, Financial Condition and Basis of Presentation (Details Textual) $ / shares in Units, $ in Thousands		Aug. 25, 2020USD ($)$ / sharesshares	Jul. 10, 2020USD ($)shares	Jul. 06, 2020USD ($)$ / sharesshares	Jul. 31, 2020shares	Apr. 30, 2020	Aug. 31, 2019USD ($)	Sep. 30, 2020USD ($)$ / sharesshares		Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)$ / sharesshares		Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)shares		Jul. 06, 2025$ / shares	Aug. 31, 2020shares
Percentage of Salaries Reductions in Reponse to COVID-19					20.00%	20.00%
Restructuring Charges, Total								$ (50)			$ 254
Cash and Cash Equivalents, at Carrying Value, Ending Balance								$ 80,621		80,600	$ 80,621		80,600	$ 16,302
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares								2,734,198			2,734,198			56,033,028
Proceeds from Issuance or Sale of Equity, Total				$ 16,100
Stock Issued During Period, Shares Upon Exercise of Warrants (in shares) | shares											52,953,400
Proceeds from Warrant Exercises											$ 16,647
Gain (Loss) on Conversion of Notes to Common Stock								$ (543)			(543)
Proceeds from Issuance of Common Stock											69,985		$ 9,647
Income Tax Expense (Benefit), Total											0
Blocksize Capital GmbH [Member]
Payments for Software, Total											$ 100
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Customer								4			4			3
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Coryton Advanced Fuels Ltd [Member]
Concentration Risk, Percentage											27.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Total Petrochemicals & Refining USA, Inc. [Member]
Concentration Risk, Percentage											20.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Eco-Energy, LLC [Member]
Concentration Risk, Percentage											14.00%			57.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | World Kinect Energy Services [Member]
Concentration Risk, Percentage											12.00%
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] | Coryton Advanced Fuels Ltd [Member]
Concentration Risk, Percentage								52.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Total Petrochemicals & Refining USA, Inc. [Member]
Concentration Risk, Percentage								39.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Eco-Energy, LLC [Member]
Concentration Risk, Percentage										73.00%	57.00%		73.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Purina Animal Nutrition, LLC [Member]
Concentration Risk, Percentage										16.00%	17.00%		16.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | HCS Group GmbH [Member]
Concentration Risk, Percentage											15.00%
Convertible 2020 Notes [Member]
Debt Conversion, Original Debt, Amount			$ 2,000
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares			4,169,426
Gain (Loss) on Conversion of Notes to Common Stock			$ (500)
Measurement Input, Price Volatility [Member] | Minimum [Member]
Warrants and Rights Outstanding, Measurement Input								1.3			1.3
Measurement Input, Price Volatility [Member] | Maximum [Member]
Warrants and Rights Outstanding, Measurement Input								1.41			1.41
Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]
Warrants and Rights Outstanding, Measurement Input								0.003			0.003
Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]
Warrants and Rights Outstanding, Measurement Input								0.0031			0.0031
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input								5			5
August 2020 Offering [Member]
Proceeds from Issuance or Sale of Equity, Total		$ 45,800
Stock Issued During Period, Shares, New Issues (in shares) | shares		21,929,313
Shares Issued, Price Per Share (in dollars per share) | $ / shares		$ 1.30
At-the-market Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares								0			1,343,121
Increase (Decrease) in At-the-Market Offering of Stock							$ 10,700
Proceeds from Issuance of Common Stock											$ 2,200
Offering of Stock, Remaining Capacity, Shares (in shares) | shares								6,500,000			6,500,000
Series 2020 B Warrants [Member]
Units Issued Warrant Per Unit (in shares) | shares				1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares				1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	[1]							$ 0.01			$ 0.01
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares				30,000,000	9,103,334				[1]			[1]		9,103,334	[1]
Stock Issued During Period, Shares Upon Exercise of Warrants (in shares) | shares											9,103,334
Proceeds from Warrant Exercises											$ 91
Warrants and Rights Outstanding								$ 2,900			$ 2,900
Series 2020 B Warrants [Member] | Forecast [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares																$ 0.01
The Series 2020 A Warrants [Member]
Warrants and Rights Outstanding, Term (Year)				5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	[1]							$ 0.60			$ 0.60
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares					30,000,000			2,682,166	[1]		2,682,166	[1]		30,000,000	[1]
Stock Issued During Period, Shares Upon Exercise of Warrants (in shares) | shares								27,317,834			27,317,834
Proceeds from Warrant Exercises								$ 16,400			$ 16,391
Warrants and Rights Outstanding								$ 8,300			$ 8,300
Series 2020C Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares		1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.01						$ 0.01	[1]		$ 0.01	[1]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		16,532,232							[1]			[1]		16,532,232	[1]		16,532,232
Stock Issued During Period, Shares Upon Exercise of Warrants (in shares) | shares											16,532,232
Proceeds from Warrant Exercises											$ 165
Class of Warrant or Right, Issuance Price (in dollars per share) | $ / shares		$ 1.29
Warrants and Rights Outstanding								$ 21,400			21,400
Series 1 Unit [Member]
Units Issued During Period (in shares) | shares				20,896,666
Units Issued Price Per Unit (in dollars per share) | $ / shares				$ 0.60
Units Issued Common Share Per Unit (in shares) | shares				1
Units Issued Warrant Per Unit (in shares) | shares				1
Series 1 Unit [Member] | Forecast [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares																$ 0.60
Series 2 Unit [Member]
Units Issued During Period (in shares) | shares				9,103,334
Units Issued Price Per Unit (in dollars per share) | $ / shares				$ 0.59
Coupon Make Whole Payments [Member] | Convertible 2020 Notes [Member]
Debt Conversion, Original Debt, Amount			$ 300
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											$ 158
Officers [Member]
Percentage of Salaries Reductions in Reponse to COVID-19						20.00%
Certain Remaining Employees [Member]
Percentage of Salaries Reductions in Reponse to COVID-19						20.00%
COVID-19 [Member]
Percentage of Revenue Reduction								97.00%
[1]	The Series 2020-A, Series 2020-B and Series 2020-C Warrants are equity-classified warrants.

Note 1 - Nature of Business, _4

Note 1 - Nature of Business, Financial Condition and Basis of Presentation - Restructuring Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Balance
Additions	$ (50)		254
Payments			(254)
Balance
Employee Severance [Member]
Balance
Additions			96
Payments			(96)
Balance
Lease Agreement [Member]
Balance
Additions			158
Payments			(158)
Balance

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
	Sep. 30, 2020	Sep. 30, 2019
Potentially dilute securities (in shares)	8,657,525	1,187,033
Share-based Payment Arrangement, Option [Member]
Potentially dilute securities (in shares)	1,552	1,564
Stock Appreciation Rights (SARs) [Member]
Potentially dilute securities (in shares)	132,566	132,566
Convertible 2020/21 Notes [Member]
Potentially dilute securities (in shares)	5,789,209
Convertible 2020 Notes [Member]
Potentially dilute securities (in shares)		997,914
Warrant [Member]
Potentially dilute securities (in shares)	52,032	54,989
Warrants Classified as Equity [Member]
Potentially dilute securities (in shares)	2,682,166

Note 3 - Revenues From Contra_3

Note 3 - Revenues From Contracts With Customers and Other Revenues (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Revenue from Contract with Customer, Including Assessed Tax	$ 192	$ 6,104	$ 5,005	$ 17,565
Contract with Customer, Asset, after Allowance for Credit Loss, Total	0		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	122	6,104	4,889	17,565
Transferred at Point in Time [Member] | Variable Consideration or Multiple Performance Obligations [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Revenue, Remaining Performance Obligation, Amount	0		0		0
Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	70		116
Transferred over Time [Member] | Variable Consideration or Multiple Performance Obligations [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	$ 0	0	$ 0
Revenue, Remaining Performance Obligation, Amount	$ 0		$ 0		$ 0

Note 3 - Revenues From Contra_4

Note 3 - Revenues From Contracts With Customers and Other Revenues - Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer, Including Assessed Tax	$ 192	$ 6,104	$ 5,005	$ 17,565
Other revenues		6		34
Total revenues	192	6,110	5,005	17,599
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	122	6,104	4,889	17,565
Other revenues
Total revenues	122	6,104	4,889	17,565
Transferred over Time [Member]
Revenue from Contract with Customer, Including Assessed Tax	70		116
Other revenues		6		34
Total revenues	70	6	116	34
Ethanol Sales and Related Products [Member]
Revenue from Contract with Customer, Including Assessed Tax	21	5,554	3,804	16,184
Other revenues
Total revenues	21	5,554	3,804	16,184
Hydrocarbon [Member]
Revenue from Contract with Customer, Including Assessed Tax	101	550	1,085	1,381
Other revenues
Total revenues	101	550	1,085	1,381
Grant and Other [Member]
Revenue from Contract with Customer, Including Assessed Tax	70		116
Other revenues		6		34
Total revenues	$ 70	$ 6	$ 116	$ 34

Note 4 - Leases, Right-to-use_3

Note 4 - Leases, Right-to-use Assets and Related Liabilities (Details Textual) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Lessee, Operating Lease, Right-of-Use Asset, Not yet Commenced, Fair Value	$ 2	$ 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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing lease cost	$ 1		$ 3
Operating lease cost	11	435	545	1,166
Short-Term lease cost	376	110	556	315
Variable lease cost	36	21	108	86
Total lease cost	$ 424	$ 566	1,212	1,567
Operating cash flows from finance lease			2
Operating cash flows from operating leases			545	1,166
Finance cash flows from finance lease			1
Right-of-use asset purchased with financing lease			$ 13
Weighted-average remaining lease term, financing lease (months) (Month)	4 years 150 days		4 years 150 days
Weighted-average remaining lease term, operating leases (months) (Month)	300 days	1 year 300 days	300 days	1 year 300 days
Weighted-average discount rate - financing lease	21.00%		21.00%
Weighted-average discount rate - operating leases	12.00%	12.00%	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	Sep. 30, 2020USD ($)
2020 (remaining), financing leases	$ 1
2020 (remaining), operating leases	77
2021, financing leases	4
2021, operating leases	180
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	18
Total, operating leases	257
Less: Amounts representing present value discounts, financing leases	(6)
Less: Amounts representing present value discounts, operating leases	(10)
Accounts Payable, Accrued Liabilities and Other Noncurrent Liabilities [Member]
Total lease liabilities, financing leases	12
Total lease liabilities, operating leases	$ 247

Note 5 - Inventories - Componen

Note 5 - Inventories - Components of Inventory Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Spare parts	$ 1,505	$ 1,521
Total inventories	2,551	3,201
Corn [Member]
Raw materials		267
Enzymes and Other Inputs [Member]
Raw materials	136	184
Jet Fuels, Isooctane and Isooctene [Member]
Finished goods	881	571
Isobutanol [Member]
Finished goods		135
Ethanol [Member]
Finished goods		93
Distiller's Grains [Member]
Finished goods		54
Agri-Energy [Member]
Work in process		254
Gevo [Member]
Work in process	$ 29	$ 122

Note 6 - Property, Plant and _3

Note 6 - Property, Plant and Equipment - Property, Plant and Equipment by Classification (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Property, plant, and equipment, gross	$ 121,340	$ 120,087
Less accumulated depreciation and amortization	(58,016)	(53,391)
Property, plant and equipment, net	$ 63,324	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	$ 17,374	17,413
Site Improvement [Member]
Property, plant and equipment, useful life (Year)	10 years
Property, plant, and equipment, gross	$ 7,157	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	$ 2,021	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	$ 8,909	$ 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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Depreciation and amortization	$ 1,470	$ 1,608	$ 4,738	$ 4,789
Cost of Sales [Member]
Depreciation and amortization	1,418	1,578	4,580	4,697
Operating Expense [Member]
Depreciation and amortization	$ 52	$ 30	$ 158	$ 92

Note 7 - Embedded Derivatives_3

Note 7 - Embedded Derivatives Liabilities (Details Textual) $ in Thousands

1 Months Ended

3 Months Ended

9 Months Ended

Jun. 30, 2017

Sep. 30, 2020USD ($)shares

Sep. 30, 2019USD ($)

Sep. 30, 2020USD ($)shares

Sep. 30, 2019USD ($)

Aug. 31, 2020shares

Aug. 25, 2020shares

Jul. 31, 2020shares

Jul. 06, 2020shares

Jan. 31, 2020

Jan. 10, 2020

Dec. 31, 2019USD ($)shares

Apr. 19, 2017

Embedded Derivative, Fair Value of Embedded Derivative, Net, Total | $

$ 30

$ 30

$ 0

Embedded Derivative, Gain (Loss) on Embedded Derivative, Net, Total | $

$ 247

$ (29)

$ 394

Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)

2,734,198

2,734,198

56,033,028

The Series 2020 A Warrants [Member]

Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)

2,682,166

[1]

2,682,166

[1]

30,000,000

30,000,000

[1]

Series 2020 B Warrants [Member]

Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)

[1]

[1]

9,103,334

30,000,000

9,103,334

[1]

Series 2020C Warrants [Member]

Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)

[1]

[1]

16,532,232

16,532,232

16,532,232

[1]

Embedded Derivative, 2020/21 Convertible Notes [Member]

Embedded Derivative, Gain (Loss) on Embedded Derivative, Net, Total | $

$ 200

$ 0

$ (30)

$ 400

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%

[1]

The Series 2020-A, Series 2020-B and Series 2020-C Warrants are equity-classified warrants.

Note 7 - Embedded Derivatives_4

Note 7 - Embedded Derivatives Liabilities - Schedule of Inputs to Lattice Model Used to Value Embedded Derivatives (Details)	Sep. 30, 2020	Dec. 31, 2019
Measurement Input, Exercise Price [Member]
Embedded derivative liability, measurement input	1	2.31
Measurement Input, Conversion Rate, Per 1000 dollars [Member]
Embedded derivative liability, measurement input	409.5	67.95
Measurement Input, Conversion Price [Member]
Embedded derivative liability, measurement input	2.44	14.72
Measurement Input, Risk Free Interest Rate [Member]
Embedded derivative liability, measurement input	0.001	0.0152
Measurement Input, Price Volatility [Member]
Embedded derivative liability, measurement input	2.47	0.6
Measurement Input, Entity Credit Risk [Member]
Embedded derivative liability, measurement input	0.36	0.27

Note 7 - Embedded Derivatives_5

Note 7 - Embedded Derivatives Liabilities - Schedule of Shares Issued Upon Exercise of Warrants (Details) - $ / shares		9 Months Ended
		Sep. 30, 2020		Aug. 31, 2020	Aug. 25, 2020	Jul. 31, 2020	Jul. 06, 2020	Dec. 31, 2019
Shares Underlying Warrants (in shares)		2,734,198						56,033,028
Series D Warrants (in shares)		53,298,830
Series D Warrants [Member]
Warrant, Issuance Date		Dec. 11, 2015
Warrants, Expiration date		Dec. 11, 2020
Warrant Exercise Price (in dollars per share)		$ 40
Shares Underlying Warrants (in shares)		47						25,125
Series D Warrants (in shares)		25,078
Series F Warrants [Member]
Warrant, Issuance Date		Apr. 1, 2016
Warrants, Expiration date		Apr. 1, 2021
Warrant Exercise Price (in dollars per share)		$ 40
Shares Underlying Warrants (in shares)		14,041						25,733
Series D Warrants (in shares)		11,692
Series I Warrants [Member]
Warrant, Issuance Date		Sep. 13, 2016
Warrants, Expiration date		Sep. 13, 2021
Warrant Exercise Price (in dollars per share)		$ 220
Shares Underlying Warrants (in shares)		35,368						35,368
Series D Warrants (in shares)
Series K Warrants [Member]
Warrant, Issuance Date		Feb. 17, 2017
Warrants, Expiration date		Feb. 17, 2022
Warrant Exercise Price (in dollars per share)		$ 2
Shares Underlying Warrants (in shares)		2,576						311,236
Series D Warrants (in shares)		308,660
The Series 2020 A Warrants [Member]
Warrant, Issuance Date	[1]	Jul. 6, 2020
Warrants, Expiration date	[1]	Jul. 6, 2025
Warrant Exercise Price (in dollars per share)	[1]	$ 0.60
Shares Underlying Warrants (in shares)		2,682,166	[1]			30,000,000		30,000,000	[1]
Series D Warrants (in shares)	[1]	27,317,834
Series 2020 B Warrants [Member]
Warrant, Issuance Date	[1]	Jul. 6, 2020
Warrants, Expiration date	[1]	Jul. 6, 2025
Warrant Exercise Price (in dollars per share)	[1]	$ 0.01
Shares Underlying Warrants (in shares)			[1]			9,103,334	30,000,000	9,103,334	[1]
Series D Warrants (in shares)	[1]	9,103,334
Series 2020C Warrants [Member]
Warrant, Issuance Date	[1]	Aug. 25, 2020
Warrants, Expiration date	[1]	Aug. 25, 2025
Warrant Exercise Price (in dollars per share)		$ 0.01	[1]		$ 0.01
Shares Underlying Warrants (in shares)			[1]	16,532,232	16,532,232			16,532,232	[1]
Series D Warrants (in shares)	[1]	16,532,232
[1]	The Series 2020-A, Series 2020-B and Series 2020-C Warrants are equity-classified warrants.

Note 7 - Embedded Derivatives_6

Note 7 - Embedded Derivatives Liabilities - Exercise of Warrants (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Common Stock Issued (in shares)		52,953,400
Proceeds		$ 16,647
The Series 2020 A Warrants [Member]
Common Stock Issued (in shares)	27,317,834	27,317,834
Proceeds	$ 16,400	$ 16,391
Series 2020 B Warrants [Member]
Common Stock Issued (in shares)		9,103,334
Proceeds		$ 91
Series 2020C Warrants [Member]
Common Stock Issued (in shares)		16,532,232
Proceeds		$ 165

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	Sep. 30, 2020	Dec. 31, 2019
Accrued utilities and supplies	$ 712	$ 645
Accounts payable - trade	1,441	1,474
Accrued employee compensation	1,593	1,946
Other accrued liabilities	1,158	1,613
Total accounts payable and accrued liabilities	$ 4,904	$ 5,678

Note 9 - Debt (Details Textual)

Note 9 - Debt (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jul. 10, 2020	Jan. 10, 2020	Apr. 19, 2017	Apr. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Jan. 31, 2020	Dec. 31, 2019	Jun. 30, 2017
Gain (Loss) on Extinguishment of Debt, Total								$ (726)
Gain (Loss) on Conversion of Notes to Common Stock					(543)			(543)
Notes Payable, Other Payables [Member]
Long-term Debt, Total					1,287			1,287			$ 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 Conversion, Original Debt, Amount	$ 2,000
Debt Conversion, Converted Instrument, Shares Issued (in shares)	4,169,426
Gain (Loss) on Conversion of Notes to Common Stock	$ (500)
Convertible 2020 Notes [Member] | Coupon Make Whole Payments [Member]
Debt Conversion, Original Debt, Amount	$ 300
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, Outstanding Balance		$ 7,000
Debt Instrument, PIK Interest		4.00%
Debt Instrument, Conversion Price Reduction, Discount Rate		10.00%
SBA Loans [Member]
Debt Instrument, Periodic Payment, Total				$ 60
Proceeds from Paycheck Protection Program Under CARES Act				$ 1,000
SBA Loans [Member] | Notes Payable, Other Payables [Member]
Long-term Debt, Total					$ 1,006			$ 1,006

Note 9 - Debt - Information Per

Note 9 - Debt - Information Pertaining to Convertible Notes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Balance
Original issue discount paid with 2020/21 Notes			282
Change in fair value of 2020/21 Notes embedded derivative	$ (247)		29	$ (394)
Balance	29		29
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			(2,819)
Balance	29		29
Convertible Debt [Member]
Balance			(123)
Balance			(30)
Balance			13,900
Amortization of debt discount			270
Amortization of debt issue costs			20
Paid-in-kind interest			316
Original issue discount paid with 2020/21 Notes			(282)
Conversion of 2020/21 Notes into common stock
Conversion of 2020/21 Notes into common stock
Conversion of 2020/21 Notes into common stock			(2,000)
Balance	(135)		(135)
Balance	(10)		(10)
Balance	12,506		12,506
Convertible 2020 Notes [Member]
Balance			13,900
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
Conversion of 2020/21 Notes into common stock
Balance
Convertible 2020/21 Notes [Member]
Balance	12,506		12,506
Convertible 2020/21 Notes [Member] | Convertible Debt [Member]
Balance
Paid-in-kind interest			269
Exchange of 2020 Notes for 2020/21 Notes			14,100
Original issue discount paid with 2020/21 Notes			282
Conversion of 2020/21 Notes into common stock			(2,000)
Balance	12,651		12,651
Convertible Debt and Embedded Derivative Liabilities [Member]
Balance			13,900
Amortization of debt discount			270
Amortization of debt issue costs			20
Paid-in-kind interest			316
Conversion of 2020/21 Notes into common stock			(2,000)
Fair value of 2020/21 embedded derivative			2,848
Change in fair value of 2020/21 Notes embedded derivative			(2,819)
Balance	$ 12,535		$ 12,535

Note 9 - Debt - Notes Payable -

Note 9 - Debt - Notes Payable - Other (Details) - Notes Payable, Other Payables [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Notes payable, other	$ 1,287	$ 749
Less current portion	(704)	(516)
Long-term portion	583	233
SBA Loans [Member]
Notes payable, other	1,006
Notes Payable, Equipment [Member]
Notes payable, other	281	321
Notes Payable, Insurance [Member]
Notes payable, other		$ 428

Note 9 - Debt - Future Payments

Note 9 - Debt - Future Payments for Notes Payable - Other (Details) - Notes Payable, Other Payables [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
2020 (remaining)	$ 134
2021	763
2022	290
2023	65
2024 and thereafter	35
Long-term Debt, Total	$ 1,287	$ 749

Note 10 - Equity Incentive Pl_2

Note 10 - Equity Incentive Plans (Details Textual) - shares

Jul. 06, 2020

Jul. 31, 2020

Apr. 30, 2020

Mar. 31, 2020

Feb. 29, 2020

Sep. 30, 2020

Jun. 30, 2020

Sep. 30, 2020

Sep. 30, 2019

Dec. 31, 2019

Jun. 03, 2020

Jun. 10, 2019

Percentage of Salaries Reductions in Reponse to COVID-19

20.00%

20.00%

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

4,454,046

Stock Incentive Plan 2010 [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)

1,242,905

1,242,905

6,980,074

3,266,661

Common Stock, Capital Shares Reserved for Future Issuance (in shares)

3,713,413

Stock Incentive Plan 2010 [Member] | Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)

115,156

239,155

Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)

245,990

77,768

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)

3,989,140

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)

101,730

29,032

1,258

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)

2 years

2 years

Employee Stock Purchase Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)

190

Common Stock, Capital Shares Reserved for Future Issuance (in shares)

190

Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)

4,055

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) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)$ / shares
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share) | $ / shares	$ 20
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) | $ / shares	$ 99,300
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $	$ 1.5
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $	$ 3.1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 219 days

Note 11 - Stock-based Compens_4

Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock-based compensation	$ 674	$ 568	$ 1,347	$ 938
Stock Options Issued to Employees and Board Members [Member] | Research and Development Expense [Member]
Stock-based compensation	142	68	353	129
Stock Options Issued to Employees and Board Members [Member] | Selling, General and Administrative Expenses [Member]
Stock-based compensation	500	236	1,122	581
Restricted Stock [Member] | Research and Development Expense [Member]
Stock-based compensation	16	132	(61)	114
Restricted Stock [Member] | Selling, General and Administrative Expenses [Member]
Stock-based compensation	$ 16	$ 132	$ (67)	$ 114

Note 11 - Stock-based Compens_5

Note 11 - Stock-based Compensation - Stock Option Award Activity (Details) - $ / shares		9 Months Ended	12 Months Ended
		Sep. 30, 2020	Dec. 31, 2019
Options outstanding (in shares)		1,561
Options outstanding, weighted average exercise price (in dollars per share)	[1]	$ 928.79
Options outstanding, weighted average remaining contractual term (Year)		5 years 302 days	6 years 204 days
Granted (in shares)
Granted, weighted average exercise price (in dollars per share)	[1]
Canceled or forfeited (in shares)		(9)
Canceled or forfeited, weighted average exercise price (in dollars per share)	[1]	$ 72,891.04
Exercised (in shares)
Exercised, weighted average exercise price (in dollars per share)	[1]
Options outstanding (in shares)		1,552	1,561
Options outstanding, weighted average exercise price (in dollars per share)	[1]	$ 556.13	$ 928.79
Options exercisable (in shares)		1,552
Options exercisable, weighted average exercise price (in dollars per share)	[1]	$ 556.13
Options exercisable, weighted average remaining contractual term (Year)		5 years 302 days
Options vested and expected to vest (in shares)		1,552
Options vested and expected to vest, weighted average exercise price (in dollars per share)	[1]	$ 556.13
Options vested and expected to vest, weighted average remaining contractual term (Year)		5 years 302 days
[1]	Exercise price of options outstanding range from $20.00 to $99,300.00 as of September 30, 2020.

Note 11 - Stock-based Compens_6

Note 11 - Stock-based Compensation - Non-vested Restricted Stock (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 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	4,454,046
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.63
Vested (in shares) | shares	(1,015,336)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.47
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	4,740,349
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.80

Note 12 - Commitments and Con_2

Note 12 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Sep. 30, 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 Thousands	Sep. 30, 2020	Dec. 31, 2019
Embedded Derivative, Fair Value of Embedded Derivative Liability	$ 29
Series F Warrants and Series K Warrants [Member]
Warrants and Rights Outstanding	$ 0	$ 10

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	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Recurring [Member] | Embedded Derivative [Member]
Derivative liability, fair value	$ 29
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	29
Fair Value, Recurring [Member] | Warrant [Member]
Derivative liability, fair value		$ 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		8
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member]
Corn and finished goods inventory, fair value	599	940
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member] | Fair Value, Inputs, Level 1 [Member]
Corn and finished goods inventory, fair value		267
Fair Value, Nonrecurring [Member] | Corn and Finished Goods Inventory [Member] | Fair Value, Inputs, Level 2 [Member]
Corn and finished goods inventory, fair value	599	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	9 Months Ended
	Sep. 30, 2020USD ($)
Derivative Financial Instruments, Liabilities [Member]
Balance, December 31, 2019	$ 8
Issue of 2020/21 Notes embedded derivative liability
Total (gains) included in earnings	(8)
Balance, September 30, 2020
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	(2,819)
Balance, September 30, 2020	$ 29

Note 14 - Segments (Details Tex

Note 14 - Segments (Details Textual) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 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		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Total revenues		$ 192	$ 6,110	$ 5,005	$ 17,599
Loss from operations		(6,103)	(8,003)	(19,336)	(20,124)
Interest expense		473	605	1,559	2,127
Depreciation and amortization		1,476	1,628	4,754	4,849
Acquisitions of plant, property and equipment		106	781	1,404	4,924
Assets	[1]	153,487		153,487		$ 93,359
UNITED STATES
Total revenues		12	5,560	3,853	16,218
Non-US [Member]
Total revenues		180	550	1,152	1,381
Intersegment Eliminations [Member]
Assets	[2]	(133,065)		(133,065)		(141,851)
Gevo [Member]
Total revenues		176	550	1,198	1,381
Loss from operations		(3,831)	(3,830)	(9,896)	(9,463)
Interest expense		465	605	1,546	2,127
Depreciation and amortization		53	50	159	152
Acquisitions of plant, property and equipment				79	62
Gevo [Member] | Operating Segments [Member]
Assets		152,762		152,762		91,861
Gevo Development / Agri-Energy [Member]
Total revenues		16	5,560	3,807	16,218
Loss from operations		(2,272)	(4,173)	(9,440)	(10,661)
Interest expense		8		13
Depreciation and amortization		1,423	1,578	4,595	4,697
Acquisitions of plant, property and equipment		106	$ 781	1,325	$ 4,862
Gevo Development / Agri-Energy [Member] | Operating Segments [Member]
Assets		$ 133,790		$ 133,790		$ 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 nine months ended September 30, 2020 and $0.4 million for the year ended December 31, 2019 for hydrocarbon sales.