FAIR VALUE MEASUREMENTS - Changes to Fair Value Measurement Level 3 (Details) - Level 3 - Fair Value, Recurring $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivative liability, beginning balance	$ 101,615
Exercise of warrants	(82,018)
Conversion of redeemable convertible preferred stock	(12,881)
Remeasurement to fair value	(6,716)
Derivative liability, ending balance	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
Exercise of warrants	0
Conversion of redeemable convertible preferred stock	(12,881)
Remeasurement to fair value	(3,954)
Derivative liability, ending balance	0
Series B Warrant Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivative liability, beginning balance	84,780
Exercise of warrants	(82,018)
Conversion of redeemable convertible preferred stock	0
Remeasurement to fair value	(2,762)
Derivative liability, ending balance	$ 0