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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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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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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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	3 Months Ended	12 Months Ended
Note 9 - Shareholders' Equity (Details Textual)	Dec. 23, 2024	Nov. 21, 2021 shares	Dec. 31, 2020 € / shares shares	Mar. 31, 2025 € / shares shares	Dec. 31, 2024 € / shares shares	Dec. 31, 2023 shares	Dec. 31, 2022 shares	Dec. 22, 2024 € / shares
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	19,724	15,967
CSOP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures			1,850,100
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| € / shares			€ 0.06
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				4,300,000	4,300,000
Common Stock, Par or Stated Value Per Share \| € / shares				€ 0.02	€ 0.02			€ 0.06
Common Stock, Shares, Issued				1,409,921	1,409,885
Common Stock, Shares, Outstanding				1,409,921	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				53,400	53,400
Common Stock, Par or Stated Value Per Share \| € / shares				€ 0.5	€ 0.5			€ 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