FAIR VALUE MEASUREMENTS - Changes to Fair Value Measurement Level 3 (Details) - Liabilities - Fair Value, Recurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Series A Warrant Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Remeasurement to fair value	$ 0
Series A Embedded Derivative Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Remeasurement to fair value		$ (3,400)
Series B Warrant Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Remeasurement to fair value	(1,200)	(37,000)
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivative liability, beginning balance			$ 101,615	$ 126,117
Remeasurement to fair value			(6,716)	(34,590)
Exercise of warrants			(82,018)
Conversion of redeemable convertible preferred stock			12,881
Derivative liability, ending balance	0	91,527	0	91,527
Level 3 | Series A Warrant Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivative liability, beginning balance			0	11,291
Remeasurement to fair value			0	(1,895)
Exercise of warrants			0
Conversion of redeemable convertible preferred stock			0
Derivative liability, ending balance	0	9,396	0	9,396
Level 3 | 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
Remeasurement to fair value			(3,954)	3,941
Exercise of warrants			0
Conversion of redeemable convertible preferred stock			12,881
Derivative liability, ending balance	0	22,389	0	22,389
Level 3 | 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
Remeasurement to fair value			(2,762)	(36,636)
Exercise of warrants			(82,018)
Conversion of redeemable convertible preferred stock			0
Derivative liability, ending balance	$ 0	$ 59,742	$ 0	$ 59,742