Fair Value Measurements - Significant inputs as of the valuation dates (Details) - Level 3	Sep. 30, 2025 $ / shares USD ($)	Jan. 07, 2025 $ / shares USD ($)
Stock Price | Series A
Fair Value Measurements
Warrants, measurement input	0.81	15.91
Stock Price | Series B
Fair Value Measurements
Warrants, measurement input	0.81	15.91
Exercise Price | Series A
Fair Value Measurements
Warrants, measurement input	8.06	45
Exercise Price | Series B
Fair Value Measurements
Warrants, measurement input	8.06	45
Expected volatility | Series A
Fair Value Measurements
Warrants, measurement input	1.51	0.99
Expected volatility | Series B
Fair Value Measurements
Warrants, measurement input	2.03	1.30
Risk-free interest rate | Series A
Fair Value Measurements
Warrants, measurement input	0.037	0.0436
Risk-free interest rate | Series B
Fair Value Measurements
Warrants, measurement input	0.036	0.0422
Expected life (in years) | Series A
Fair Value Measurements
Warrants, measurement input | $	4.27	5
Expected life (in years) | Series B
Fair Value Measurements
Warrants, measurement input | $	1.77	2.5