Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 62,789	$ 25,552
Prepaid expenses and other current assets	1,149	835
Total current assets	63,938	26,387
Property, plant and equipment, net	218,646	173,816
Operating lease right-of-use assets, net	1,474	590
Other non-current assets	28,372	21,312
Total assets	312,430	222,105
Current liabilities
Accounts payable	1,084	281
Accrued liabilities and other current liabilities	23,184	5,973
Current Common Stock Warrant liabilities	0	1,376
Current operating lease liabilities	1,093	596
Total current liabilities	25,361	8,226
Non-current Common Stock Warrant liabilities	6,790	2,587
Non-current operating lease liabilities	465	0
Other non-current liabilities	23,000	23,000
Total liabilities	55,616	33,813
Commitments and contingencies (Note 14)
Stockholders’ equity
Common stock, $0.0001 par value Authorized: 480.0 million shares at December 31, 2022 and 2021, Issued and outstanding: 143.5 million shares and 120.8 million shares at December 31, 2022 and 2021, respectively	14	12
Treasury stock: 991,089 shares and 346,126 shares at December 31, 2022 and 2021, respectively, at cost	(4,587)	(1,315)
Preferred stock, $0.0001 par value Authorized: 0.5 million, after designation of the Convertible Preferred Stock, Issued and outstanding: none at December 31, 2022 and 2021	0	0
Additional paid-in-capital	289,084	191,264
Accumulated deficit	(230,140)	(170,069)
Total stockholders’ equity	54,371	19,892
Total liabilities, Convertible Preferred Stock and stockholders’ equity	312,430	222,105
Series A Convertible Preferred Stock [Member]
Current liabilities
Convertible Preferred Stock	73,026	63,791
Series B Convertible Preferred Stock [Member]
Current liabilities
Convertible Preferred Stock	73,408	64,602
Series C Convertible Preferred Stock [Member]
Current liabilities
Convertible Preferred Stock	$ 56,009	$ 40,007