Income Tax - Schedule of Unrecognized Deferred Taxes (Details) - EUR (€) € in Thousands	Sep. 30, 2025	Sep. 30, 2024
Tax Loss Carry Forwards
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognized deferred taxes	€ 72,811	€ 99,851

The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
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-URIDate 2025-03-27

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