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FAIR VALUE MEASUREMENTS - Significant unobservable inputs (Details) - Monte-Carlo simulation valuation technique - Level 3 | Jun. 30, 2025 Y $ / shares | Dec. 31, 2024 Y $ / shares
--- | --- | ---
Stock price |  |
FAIR VALUE MEASUREMENTS |  |
Warrant liability | 0.67 | 0.79
Exercise price |  |
FAIR VALUE MEASUREMENTS |  |
Warrant liability | 4 | 4
Expected term (in years) |  |
FAIR VALUE MEASUREMENTS |  |
Warrant liability | Y | 3.95 | 4.44
Volatility |  |
FAIR VALUE MEASUREMENTS |  |
Warrant liability | 0.864 | 0.912
Risk-free interest rate |  |
FAIR VALUE MEASUREMENTS |  |
Warrant liability | 0.0371 | 0.0453

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