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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash Flow Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Cash payments included in operating activities: |  |  |  |
Interest paid |  |  | $ 12,240 | $ 0
Income taxes paid, net of refunds |  |  | 0 | 0
Noncash investing and financing activities: |  |  |  |
Accrued purchases of property and equipment |  |  | 34,322 | 6,133
Issuance of penny warrants |  |  | 13,510 | 0
Issuance of shares of common stock for debt conversion |  |  | 33,139 | 0
Deemed dividend related to amendment to Preferred Stock |  |  | 7,777 | 0
Deemed dividend related to amendment of Tranche Right | $ 1,667 | $ 0 | $ 1,667 | $ 0

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