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FAIR VALUE MEASUREMENTS - Changes to Fair Value Measurement Level 3 (Details) - Liabilities - Level 3 - Fair Value, Recurring - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Derivative liability, beginning balance | $ 101,615 | $ 126,117
Exercise of warrants | (82,018) | (9,396)
Remeasurement to fair value | (6,716) | (15,106)
Conversion of redeemable convertible preferred stock | 12,881 |
Derivative liability, ending balance | 0 | 101,615
Series A Warrant Liabilities |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Derivative liability, beginning balance | 0 | 11,291
Exercise of warrants | 0 | (9,396)
Remeasurement to fair value | 0 | (1,895)
Conversion of redeemable convertible preferred stock | 0 |
Derivative liability, ending balance | 0 | 0
Series A Embedded Derivative Liabilities |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Derivative liability, beginning balance | 16,835 | 18,448
Exercise of warrants | 0 | 0
Remeasurement to fair value | (3,954) | (1,613)
Conversion of redeemable convertible preferred stock | 12,881 |
Derivative liability, ending balance | 0 | 16,835
Series B Warrant Liabilities |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Derivative liability, beginning balance | 84,780 | 96,378
Exercise of warrants | (82,018) | 0
Remeasurement to fair value | (2,762) | (11,598)
Conversion of redeemable convertible preferred stock | 0 |
Derivative liability, ending balance | $ 0 | $ 84,780

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Conversions + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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