Notes Payable - Summary of Company's Notes Payable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Notes Payable, Total	$ 18,174	$ 4,409
Less: short-term portion	(15,860)	(1,211)
Total Notes Payable, less current portion	2,314	3,198
PGE Loan [Member]
Debt Instrument [Line Items]
Notes Payable, Total	3,513	4,409
Less: short-term portion	(1,199)	$ (1,211)
Mudrick Super Priority Note [Member]
Debt Instrument [Line Items]
Notes Payable, Total	14,661
Less: short-term portion	$ (14,661)