Recapitalization Transaction (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Jun. 30, 2020 USD ($)	May 29, 2020 USD ($) $ / shares shares
Business Acquisition [Line Items]
Cash | $	$ 30,220	$ 56,363	$ 47,293
Common stock, issued (in shares)	59,977,318	59,901,306
Common stock, outstanding (in shares)	59,977,318	59,901,306
Reverse recapitalization, conversion ratio	0.112
Mudrick
Business Acquisition [Line Items]
Cash | $				$ 68,900
Common stock, issued (in shares)				50,160,042
Common stock, outstanding (in shares)				50,160,042
Cash acquired | $				$ 10,400
Liabilities assumed | $				$ 6,900
Warrants, exercise price 11.50
Business Acquisition [Line Items]
Outstanding warrants (in shares)				34,289,999
Warrants, exercise price (in dollars per share) | $ / shares				$ 11.50
Warrants, exercise price 44.82
Business Acquisition [Line Items]
Outstanding warrants (in shares)				12,721,901
Warrants, exercise price (in dollars per share) | $ / shares				$ 44.82
Number of securities called by warrants (in shares)				3,210,213