Company Overview (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	May 29, 2020	Mar. 31, 2020
Product Information [Line Items]
Cash	$ 36,497	$ 56,363		$ 6,566
Common stock, issued (in shares)	59,901,306	59,901,306
Common stock, outstanding (in shares)	59,901,306	59,901,306	50,160,042
Outstanding warrants (in shares)	22,510,038	22,510,038
Mudrick
Product Information [Line Items]
Cash			$ 68,900
Common stock, issued (in shares)			50,160,042
Common stock, outstanding (in shares)			50,160,042
Warrants, exercise price 11.50
Product Information [Line Items]
Outstanding warrants (in shares)			34,289,999
Warrants, exercise price (in dollars per share)			$ 11.50
Warrants, exercise price 44.82
Product Information [Line Items]
Outstanding warrants (in shares)			12,721,623
Warrants, exercise price (in dollars per share)			$ 44.82
Number of securities called by warrants (in shares)			3,210,213
Gold and silver | Revenue | Product concentration risk
Product Information [Line Items]
Concentration risk	100.00%