Financial Instruments and Financial Risk Management - Schedule of Fair Values and Fair Value Hierarchy of Financial Instruments Carried at Fair Value on Recurring Basis (Details) - Recurring Fair Value Measurement - FVtPL - EUR (€) € in Thousands |
Jun. 30, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Level 2 | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Currency derivative | € 23,924 | € 8,104 |
| Derivative liabilities | 1,530 | 625 |
| Level 3 | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Senior Note - embedded derivative | € 25,539 | € 32,609 |