CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS
Total operating revenues	$ 17,200	$ 1,175
Operating expenses:
Cost of production	11,991	8,698
Depreciation and amortization	19,007	7,887
Research and development expense	6,637	7,427
General and administrative expense	42,628	39,941
Project development costs	14,732	10,061
Facility idling costs	4,040	4,599
Impairment loss	0	24,749
Loss on disposal of assets		499
Total operating expenses	99,035	103,861
Loss from operations	(81,835)	(102,686)
Other income (expense)
Interest expense	(2,161)	(1,167)
Interest and investment income	19,090	3,481
Other income (expense), net	(1,309)	2,365
Total other income, net	15,620	4,679
Net loss	$ (66,215)	$ (98,007)
Net loss per share - basic (in dollars per share)	$ (0.28)	$ (0.44)
Net loss per share - diluted (in dollars per share)	$ (0.28)	$ (0.44)
Weighted-average number of common shares outstanding - basic (in shares)	238,687,621	221,537,262
Weighted-average number of common shares outstanding - diluted (in shares)	238,687,621	221,537,262