CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Cash flows from operating activities:
Net loss	$ (40,664)	$ (60,896)
Adjustments to reconcile net loss for the period to net cash used in operating activities:
Non-cash interest expense, including accelerated amortization of original issue discount and issuance costs	9,317	18,174
Depreciation and amortization	2,024	2,233
Stock-based compensation costs	1,896	2,627
Other non-cash items	682	555
Realized loss on sale of equity investment securities	525	0
Gain on sale of assets, net	(805)	(7,860)
Asset retirement obligation adjustments and accretion expense	(1,377)	7,116
Unrealized gain on equity investment securities	(1,815)	0
Gain on extinguishment of debt	(9,154)	0
Changes in operating assets and liabilities:
Accounts payable, accrued expenses, and other liabilities	2,004	(1,092)
Prepaids and deposits	(127)	1,410
Supplies inventories, net	(79)	8
Receivables	(239)	1,828
Cash settlement of paid-in-kind interest	(45,062)	0
Net cash (used in) operating activities	(82,874)	(35,897)
Cash flows from investing activities:
Proceeds from sale of assets	4,690	7,580
Additions to property, plant, and equipment	(564)	(1,253)
Net cash provided by investing activities	4,126	6,327
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs	285,876	12,198
Principal payments	(79,955)	(38,120)
Net cash provided by (used in) financing activities	205,921	(25,922)
Net increase (decrease) in cash, cash equivalents, and restricted cash	127,173	(55,492)
Cash, cash equivalents, and restricted cash, beginning of period	77,058	132,550
Cash, cash equivalents, and restricted cash, end of period	204,231	77,058
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	181,738	49,560
Restricted cash	22,493	27,498
Total cash, cash equivalents, and restricted cash	$ 204,231	$ 77,058