CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total revenues	$ 89	$ 346	$ 321	$ 359
Cost of production (including stock-based compensation)	2,640	1,617	5,730	2,518
Depreciation and amortization	1,088	1,177	2,179	2,270
Total cost of goods sold	3,728	2,794	7,909	4,788
Gross loss	(3,639)	(2,448)	(7,588)	(4,429)
Operating expenses
Research and development expense (including stock-based compensation)	1,966	1,332	3,158	2,710
Selling, general and administrative expense (including stock-based compensation)	9,209	4,846	18,576	8,660
Preliminary stage project costs	314	5,472	821	8,199
Other operations (including stock-based compensation)	601	0	1,190	0
Loss on disposal of assets	0	4,954	0	4,954
Depreciation and amortization	386	46	737	104
Total operating expenses	12,476	16,650	24,482	24,627
Loss from operations	(16,115)	(19,098)	(32,070)	(29,056)
Other income (expense)
Gain (loss) from change in fair value of derivative warrant liability	0	43	16	(10)
Interest expense	(2)	(6)	(4)	(11)
Investment income (loss)	78	0	330	0
Gain on forgiveness of SBA loan	0	641	0	641
Other income (expense), net	2,878	167	2,894	126
Total other income (expense), net	2,954	845	3,236	746
Net loss	$ (13,161)	$ (18,253)	$ (28,834)	$ (28,310)
Net loss per share - basic (in dollars per share)	$ (0.06)	$ (0.09)	$ (0.14)	$ (0.15)
Net loss per share - diluted (in dollars per share)	$ (0.06)	$ (0.09)	$ (0.14)	$ (0.15)
Weighted-average number of common shares outstanding - basic (in shares)	209,809,994	198,137,420	205,889,651	190,892,223
Weighted-average number of common shares outstanding - diluted (in shares)	209,809,994	198,137,420	205,889,651	190,892,223
Ethanol sales and related products, net
Revenue and cost of goods sold	$ 71	$ 0	$ 240	$ 0
Hydrocarbon revenue
Revenue and cost of goods sold	$ 18	$ 346	$ 81	$ 359