UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows used in operating activities:
Net loss	$ (48,287)	$ (11,759)
Adjustments to reconcile net loss for the period to net cash used in operating activities:
Stock-based compensation	19,130	528
Depreciation and amortization	385	534
Asset retirement obligation adjustments and accretion expense	306	333
(Gain) loss on sale of assets, net	114	(57)
Other non-cash items	139	(122)
Non-cash interest expense	0	2,998
Changes in operating assets and liabilities:
Prepaids and deposits	521	911
Receivables	(23)	41
Supplies inventories, net	(62)	41
Accounts payable, accrued expenses, and other liabilities	(3,537)	(3,143)
Net cash used in operating activities	(31,314)	(9,695)
Cash flows from investing activities:
Additions to property, plant, and equipment	(576)	(171)
Proceeds from sale of assets	68	57
Net cash used in investing activities	(508)	(114)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs	43,458	215
Taxes paid related to net share settlement of equity awards	(4,197)	0
Principal payments	0	(33)
Net cash provided by financing activities	39,261	182
Net increase (decrease) in cash, cash equivalents, and restricted cash	7,439	(9,627)
Cash, cash equivalents, and restricted cash, beginning of period	204,231	77,057
Cash, cash equivalents, and restricted cash, end of period	211,670	67,430
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	189,014	39,688
Restricted cash	22,656	27,742
Total cash, cash equivalents, and restricted cash	$ 211,670	$ 67,430