UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Cash flows used in operating activities:
Net loss	$ (95,182)	$ (32,872)
Adjustments to reconcile net loss for the period to net cash used in operating activities:
Stock-based compensation	44,998	1,530
Depreciation and amortization	989	1,534
Other non-cash items	192	(786)
(Gain) loss on sale of assets, net	94	(68)
Non-cash interest expense	0	9,236
Asset retirement obligation adjustments and accretion	(6,081)	(1,676)
Changes in operating assets and liabilities:
Contract liabilities	4,150	3,900
Receivables	233	(81)
Supplies inventories, net	(313)	20
Accounts payable, accrued expenses, and other liabilities	(383)	(1,932)
Prepaids and deposits	(415)	(962)
Net cash used in operating activities	(51,718)	(22,157)
Cash flows from investing activities:
Additions to property, plant, and equipment	(1,452)	(447)
Proceeds from sale of assets	88	697
Proceeds from sale of equity investment securities	625	0
Net cash (used in) provided by investing activities	(739)	250
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs	79,223	112,242
Taxes paid related to net share settlement of equity awards	(5,182)	0
Principal payments	0	(25)
Net cash provided by financing activities	74,041	112,217
Net increase in cash, cash equivalents, and restricted cash	21,584	90,310
Cash, cash equivalents, and restricted cash, beginning of period	204,231	77,057
Cash, cash equivalents, and restricted cash, end of period	225,815	167,367
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	211,217	139,094
Restricted cash	14,598	28,273
Total cash, cash equivalents, and restricted cash	$ 225,815	$ 167,367