Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Cash interest paid	$ 1,495	$ 0
Significant non-cash financing and investing activities:
Increase in debt from in-kind interest	2,340	3,971
Mobile equipment acquired by note payable	0	407
Plant, equipment, and mine development additions included in accounts payable	0	911
Liability based restricted stock units transferred to equity	37	0
Accrual of equity issuance costs included in Accounts payable and accrued expenses	766	0
1.5 Lien Notes to common stock
Significant non-cash financing and investing activities:
Exchange of Seller lien notes	$ 3,300	$ 0