CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues - Note 15	$ 8,758	$ 31,676	$ 21,755	$ 86,713
Cost of sales:
Production costs	8,803	30,616	22,020	77,927
Depreciation and amortization	1,025	1,577	2,577	4,191
Mine site period costs	1,409	11,467	10,429	24,445
Total cost of sales	11,237	43,660	35,026	106,563
Operating expenses:
General and administrative	3,032	3,313	11,352	12,271
Projects, exploration, and development	7,011	2,344	8,200	3,860
Write-off of deposit	0	916	0	916
Accretion - Note 13	102	102	306	306
Loss from operations	(12,624)	(18,659)	(33,129)	(37,203)
Other (expense) income:
Interest expense, net of capitalized interest - Note 10	(4,459)	(5,461)	(14,003)	(15,176)
Interest income	826	0	846	0
Fair value adjustment to warrants - Notes 12 and 20	1,133	812	(482)	10,956
Commissions expense - Note 7	(936)	0	(936)	0
Gain on sale of equipment and supplies inventories	211	0	813	0
Loss before income taxes	(15,849)	(23,308)	(46,891)	(41,423)
Income tax benefit - Note 17	0	95	0	95
Net loss	$ (15,849)	$ (23,213)	$ (46,891)	$ (41,328)
Loss per share:
Basic (in dollars per share)	$ (0.08)	$ (0.39)	$ (0.29)	$ (0.69)
Diluted (in dollars per share)	$ (0.08)	$ (0.39)	$ (0.29)	$ (0.69)
Weighted average shares outstanding:
Basic (in shares)	199,207,092	60,114,358	159,607,217	59,989,457
Diluted (in shares)	199,207,092	60,114,358	159,607,217	59,989,457