CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Assets:
Cash and cash equivalents	$ 55,834,000	$ 106,210,000
Prepaids and deposits – Note 3	4,277,000	3,326,000
Income tax receivable – Note 25	1,530,000	1,530,000
Supplies inventories, net – Note 4	1,445,000	1,834,000
Securities available-for-sale – Notes 5 and 10	708,000	0
Interest receivable	326,000	667,000
Other receivables	7,000	0
Current assets	64,127,000	113,567,000
Property, plant, and equipment, net – Note 6	51,964,000	53,091,000
Restricted cash – Note 7	27,240,000	26,340,000
Assets held-for-sale – Note 8	4,383,000	7,148,000
Securities available-for-sale – Notes 5 and 10	708,000	0
Prepaids – Note 3	600,000	1,547,000
Total assets	149,022,000	201,693,000
Liabilities:
Asset retirement obligation – Note 13	4,044,000	3,172,000
Accounts payable and accrued expenses	3,183,000	1,631,000
Debt, net – Notes 11 and 22	79,000	2,330,000
Contract liabilities – Note 12	0	1,550,000
Other liabilities – Note 9	2,278,000	3,063,000
Current liabilities	9,584,000	11,746,000
Debt, net – Notes 11 and 22	122,026,000	142,617,000
Deferred gain on sale of royalty	29,839,000	29,839,000
Asset retirement obligation – Note 13	10,695,000	4,801,000
Warrant liabilities – Notes 10 and 14	10,000	26,000
Other liabilities – Note 9	2,000	8,000
Total liabilities	172,156,000	189,037,000
Commitments and contingencies – Note 23
Stockholders’ equity – Note 15
Common stock, $0.0001 par value; 1,400,000,000 shares authorized; 24,132,592 issued and outstanding at September 30, 2024, and 20,736,612 issued and outstanding at December 31, 2023, respectively	21,000	21,000
Additional paid-in capital	750,177,000	737,810,000
Accumulated deficit	(773,332,000)	(725,175,000)
Total stockholders’ (deficit) equity	(23,134,000)	12,656,000
Total liabilities and stockholders’ (deficit) equity	$ 149,022,000	$ 201,693,000