CONVERTIBLE PREFERRED STOCK, CONVERTIBLE PREFERRED STOCK WARRANT LIABILITY AND COMMON STOCK - Valuation Techniques (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Volatility \| Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.570	0.630
Volatility \| Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.5700	0.630
Risk-free interest rate \| Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.0350	0.0430
Risk-free interest rate \| Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0.0350	0.0430
Expected term (in years) \| Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expected term (in years)	2 years 9 months	2 years 9 months
Expected term (in years) \| Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expected term (in years)	2 years 9 months	2 years 9 months
Dividend yield \| Series E-1 Convertible Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0	0
Dividend yield \| Series F Convertible Preferred Stock warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assumptions	0	0