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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Net number of non-option equity instruments granted to participants.

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Net number of share options (or share units) granted during the period.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Note 9 - Shareholders' Equity (Details Textual)			1 Months Ended	9 Months Ended	12 Months Ended
Note 9 - Shareholders' Equity (Details Textual)	Dec. 23, 2024 € / shares	Nov. 21, 2021 shares	Dec. 31, 2020 € / shares shares	Sep. 30, 2025 € / shares shares	Dec. 31, 2024 € / shares shares	Dec. 22, 2024 € / shares
Preferred Stock, Shares Authorized				1,401	1,401
Preferred Stock, Par or Stated Value Per Share \| € / shares				€ 300	€ 300
Preferred Stock, Shares Issued				1,401	0
Preferred Stock, Shares Outstanding				1,401	0
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted		63,868
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period				19,724	19,724
CSOP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures			42,183
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| € / shares			€ 4.5
CSOP [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			1 year
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period			4 years
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	75
Ordinary Shares [Member]
Common Stock, Shares Authorized				120,000,000	120,000,000
Common Stock, Par or Stated Value Per Share \| € / shares	€ 0.02			€ 0.01	€ 0.01	€ 0.06
Common Stock, Shares, Issued				1,424,186	1,409,885
Common Stock, Shares, Outstanding				1,424,186	1,409,885
Ordinary Shares [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	75
High Voting Shares [Member]
Common Stock, Shares Authorized				40,000	40,000
Common Stock, Par or Stated Value Per Share \| € / shares	€ 0.5			€ 0.25	€ 0.25	€ 1.5
Common Stock, Shares, Issued				40,000	40,000
Common Stock, Shares, Outstanding				40,000	40,000
High Voting Shares [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	75