CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets:
Cash	$ 12,342	$ 56,363
Accounts receivable	0	426
Income taxes receivable	1,530	0
Inventories	11,069	12,867
Ore on leach pads	10,106	38,041
Prepaids and other, net	2,342	4,303
Current assets	37,389	112,000
Ore on leach pads	0	7,243
Plant, equipment, and mine development, net	58,484	60,223
Restricted cash	34,293	39,677
Other assets	600	13,483
Assets held for sale	11,558	0
Total assets	142,324	232,626
Liabilities:
Accounts payable and accrued expenses	9,430	12,280
Debt, net	16,666	5,120
Deferred gain on sale of royalty	125	124
Other liabilities	5,044	4,157
Current liabilities	31,265	21,681
Warrant liabilities	669	15,389
Debt, net	143,638	142,665
Deferred gain on sale of royalty	29,714	29,839
Asset retirement obligation	5,193	4,785
Other liabilities	339	1,650
Total liabilities	210,818	216,009
Commitments and contingencies
Stockholders' (deficit) equity
Common stock, $0.0001 par value; 400,000,000 shares authorized; 60,433,395 issued and outstanding at December 31, 2021; and 59,901,306 issued and outstanding at December 31, 2020	6	6
Additional paid-in capital	540,823	537,370
Accumulated deficit	(609,323)	(520,759)
Total stockholders' (deficit) equity	(68,494)	16,617
Total liabilities and stockholders' (deficit) equity	$ 142,324	$ 232,626