CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets:
Cash and cash equivalents	$ 39,688	$ 49,560
Prepaids and deposits	1,952	2,863
Supplies inventories, net	1,302	1,354
Equity securities	739	454
Receivables, net	328	369
Current assets	44,009	54,600
Property, plant, and equipment and assets held-for-sale, net	56,976	57,286
Restricted cash	27,742	27,498
Prepaids	600	600
Equity securities	0	151
Total assets	129,327	140,135
Liabilities:
Asset retirement obligation	179	179
Accounts payable, accrued expenses, and other liabilities	2,515	5,561
Debt, net	28	54
Current liabilities	2,722	5,794
Debt, net	127,936	124,945
Deferred gain on sale of royalty	29,839	29,839
Asset retirement obligation	13,305	12,972
Other liabilities	31	0
Total liabilities	173,833	173,550
Commitments and contingencies
Stockholders’ deficit
Common stock, $0.0001 par value; 1,400,000,000 shares authorized; 24,983,358 issued and outstanding at March 31, 2025, and 24,875,587 issued and outstanding at December 31, 2024, respectively	21	21
Additional paid-in capital	753,298	752,630
Accumulated deficit	(797,825)	(786,066)
Total stockholders’ deficit	(44,506)	(33,415)
Total liabilities and stockholders’ deficit	$ 129,327	$ 140,135