CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Assets:
Cash and cash equivalents	$ 189,014	$ 181,738
Prepaids and deposits	2,440	2,953
Supplies inventories, net	1,463	1,416
Equity investment securities	660	776
Receivables	632	609
Current assets	194,209	187,492
Property, plant, and equipment and assets held-for-sale, net	53,006	53,005
Restricted cash	22,656	22,493
Prepaids	29	37
Total assets	269,900	263,027
Liabilities:
Accounts payable, accrued expenses, and other liabilities	4,183	7,712
Asset retirement obligation	22	22
Current liabilities	4,205	7,734
Deferred gain on sale of royalty	29,839	29,839
Asset retirement obligation, non-current	12,057	11,751
Other liabilities	0	8
Total liabilities	46,101	49,332
Commitments and contingencies - Note 17
Stockholders’ equity
Common stock, $0.0001 par value; 1,400,000,000 shares authorized; 91,360,601 issued and outstanding at March 31, 2026, and 83,025,384 issued and outstanding at December 31, 2025, respectively	9	8
Additional paid-in capital	1,098,807	1,040,417
Accumulated deficit	(875,017)	(826,730)
Total stockholders’ equity	223,799	213,695
Total liabilities and stockholders’ equity	$ 269,900	$ 263,027