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WARRANTS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | May 14, 2026 | Apr. 28, 2026 | Dec. 31, 2025
Class of Warrant or Right [Line Items] |  |  |  |  |
Warrants outstanding (in shares) | 3,550,329 |  |  |  |
Loss related to remeasurement of warrants | $ 13,146 | $ 0 |  |  |
Fair value of warrants | $ 23,400 |  |  |  | $ 10,200
Series E-2 convertible preferred stock |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of shares issuable upon exercise of warrant (in shares) | 3,550,329 |  |  |  |
Class A common stock | Subsequent event |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of shares issuable upon conversion of preferred stock (in shares) |  |  | 2,554,107 | 2,554,107 |

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