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FAIR VALUE MEASUREMENTS - Schedule of Change in Fair Value of Convertible Notes (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Loss on extinguishment | $ 0 |  | $ 26,359,000 |  | $ 0 | $ 26,359,000
Private Placement Warrant Liability |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Remeasurement of warrant liability | (499,000) |  | 0 |  | 112,000 | 0
Convertible Notes Payable | Nonrelated Party |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 0 | $ 0 | 20,274,000 | $ 15,604,000 | $ 0 | 15,604,000
Note issuance during the period |  |  | 10,130,000 | 3,457,000 |  |
Loss on extinguishment |  |  | 22,183,000 |  |  |
Change in estimated fair value |  |  | 15,874,000 | 1,213,000 |  |
Ending balance |  | $ 0 | $ 68,461,000 | $ 20,274,000 |  | $ 68,461,000

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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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