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FAIR VALUE MEASUREMENTS - Liabilities measured at fair value on a recurring basis (Details) - Recurring $ in Thousands	Sep. 30, 2025 USD ($)
Current liabilities
Total current liabilities recorded at fair value	$ (9,925)
Series A-1 Convertible Notes
Current liabilities
Convertible Notes	(5,715)
Series B-1 Convertible Notes
Current liabilities
Convertible Notes	(4,210)
Level 3
Current liabilities
Total current liabilities recorded at fair value	(9,925)
Level 3 | Series A-1 Convertible Notes
Current liabilities
Convertible Notes	(5,715)
Level 3 | Series B-1 Convertible Notes
Current liabilities
Convertible Notes	$ (4,210)

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Fair value of financial and nonfinancial obligations.

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