Fair Value Measurements - Assumptions (Details)	Dec. 31, 2025 Y $ / shares	Sep. 30, 2025 $ / shares Y
Term
Fair value inputs
Debt inputs | Y	0.5	0.8
Volatility
Fair value inputs
Debt inputs	1.72	1.18
Risk-free rate
Fair value inputs
Debt inputs	0.036	0.038
Dividend yield
Fair value inputs
Debt inputs	0	0
Credit-adjusted discount rate
Fair value inputs
Debt inputs	0.199	0.188
Stock price (in dollars per share)
Fair value inputs
Debt inputs | $ / shares	1.58	1.06