Debt, Net - Components of recorded interest expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Amortization of original issue discount	$ 1,158	$ 1,088
Amortization of debt issuance costs	337	335
Other interest expense	18	8
Capitalized interest	0	(654)
Total	5,346	4,449
Sprott Credit Agreement
Debt Instrument [Line Items]
Interest expense, debt	1,493	1,552
Subordinated Notes
Debt Instrument [Line Items]
Interest expense, debt	$ 2,340	$ 2,120