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

[1] All other significant non-cash items relate to the activities of Gevo.

[2] Includes intercompany sales of $0.1 million during the three months ended March 31, 2020 and $0.4 million for the year ended December 31, 2019 for hydrocarbon sales.