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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Cash flows from operating activities      
Net loss $ (182,565) $ (289,136) $ (101,715)
Adjustments to reconcile net loss to net cash used in operating activities      
Equity-based compensation 14,935 11,653 11,829
Depreciation expense 29,120 31,320 15,935
Loss on disposal of equipment 3,932 0 0
Write-down of long-lead equipment 15,070 0 0
Operating lease amortization expense 4,546 3,388 2,923
Amortization of debt issuance costs and debt discounts 23,762 16,618 2,534
Loss on extinguishment of debt 4,394 21,214 0
Change in fair value of warrants (61,742) 71,610 (33,824)
Change in fair value of derivative (3,443) (1,894) 0
Deferred taxes 970 (79) 650
Other 794 427 1,554
Changes in operating assets and liabilities      
Accounts receivable (2,007) 0 0
Inventory (1,283) (3,295) (4,476)
Prepaid expenses and other current assets (232) (3,220) (4,397)
Prepaid expenses and other noncurrent assets (273) 220 711
Accounts payable 2,537 4,777 418
Accrued expenses and other current liabilities 8,274 (4,375) 4,045
Accrued interest 4,285 (1,136) 11,207
Operating lease right-of-use liabilities (3,814) (2,918) (2,300)
Net cash used in operating activities (142,740) (144,826) (94,906)
Cash flows from investing activities      
Purchase of property, plant and equipment (40,847) (55,584) (153,899)
Purchase of debt securities, available for sale (13,621) (30,586) (57,575)
Sale and maturity of debt securities, available for sale 0 79,161 109,371
Net cash used in investing activities (54,468) (7,009) (102,103)
Cash flows from financing activities      
Proceeds from issuance of common stock 33,462 38,203 0
Payments on related party revenue bonds (10,355) (980) 0
Payment to purchase revenue bonds 0 (253,230) 0
Proceeds from issuance and exercise of warrants 6,616 30,050 0
Proceeds from equipment lease financing 0 12,932 22,101
Payments on equipment lease financing (28,722) (5,501) (592)
Debt and preferred stock issuance costs (8,720) (1,119) (11,048)
Payments to repurchase shares (4,928) (1,618) (1,370)
Proceeds from convertible note offering 0 0 225,000
Other net payments for financing activities (525) 2,255 (91)
Net cash provided by/(used in) financing activities 323,731 (109,168) 272,000
Net increase/(decrease) in cash and cash equivalents and restricted cash 126,523 (261,003) 74,991
Cash and cash equivalents and restricted cash, beginning of period 41,511 302,514 227,523
Cash and cash equivalents and restricted cash, end of period 168,034 41,511 302,514
Operating activities      
Interest paid during the period, net of capitalized interest 36,111 42,353 13,862
Non-cash financing activities      
Carrying value of warrant liability issued to satisfy shareholder loan prepayment penalty 0 44,386 0
Initial fair value of warrant liability issued to satisfy shareholder loan prepayment penalty 0 6,802 0
Reconciliation of cash and cash equivalents and restricted cash reported in the consolidated balance sheets      
Cash and cash equivalents 156,694 15,683 73,411
Restricted cash - current 1,984 16,656 25,692
Restricted cash - noncurrent 9,356 9,172 203,411
Total cash and cash equivalents and restricted cash 168,034 41,511 302,514
Series A Preferred Stock      
Cash flows from financing activities      
Proceeds from issuance of Series A Preferred shares, inclusive of put option 0 21,840 0
Non-cash financing activities      
PIK interest 4,099 0 0
Series B Convertible Perpetual Preferred Stock      
Non-cash financing activities      
PIK dividends on Series B Convertible Perpetual Preferred Stock 11,324 0 0
Series B      
Cash flows from financing activities      
Proceeds from issuance of Series B Convertible Perpetual Preferred Stock 300,000 0 0
Third Party      
Cash flows from financing activities      
Proceeds from issuance of revenue bonds 16,808 8,000 0
Related Party      
Cash flows from financing activities      
Proceeds from issuance of revenue bonds 20,095 40,000 0
Proceeds from revolving credit facility and related party note payable 14,900 0 38,000
Payments on revolving credit facility and related party note payable (14,900) 0
Non-cash financing activities      
PIK interest 0 1,938 3,125
Accounts Payable and Accrued Expenses      
Non-cash investing activities      
Additions to property, plant, and equipment $ 24,250 $ 33,985 $ 23,539