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FAIR VALUE MEASUREMENTS - Estimated fair value of Convertible Notes (Details) - Level 3 - Recurring	Sep. 30, 2025
Series A-1 Convertible Notes | Expected volatility
FAIR VALUE MEASUREMENTS
Debt Instrument, Measurement Input	84
Series A-1 Convertible Notes | Risk-free interest rate
FAIR VALUE MEASUREMENTS
Debt Instrument, Measurement Input	3.62
Series B-1 Convertible Notes | Expected volatility
FAIR VALUE MEASUREMENTS
Debt Instrument, Measurement Input	81
Series B-1 Convertible Notes | Risk-free interest rate
FAIR VALUE MEASUREMENTS
Debt Instrument, Measurement Input	3.61

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Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

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