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v3.25.2

Share-based compensation (Details Narrative) | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
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Jul. 31, 2025 shares | Jun. 30, 2025 $ / shares shares | Jul. 31, 2024 shares | Apr. 30, 2024 shares | Jun. 30, 2025 EUR (€) € / shares shares | Dec. 31, 2024 € / shares shares | Jun. 30, 2024 EUR (€) shares | Dec. 31, 2024 € / shares shares | Jun. 30, 2025 EUR (€) € / shares shares | Jan. 01, 2024 shares | Dec. 31, 2023 shares
Share based payment award options outstanding number |  |  |  |  |  | 970,308 |  | 970,308 | 1,465,815 | 586,923 | 586,923
Stock options, granted remaining amount |  |  |  |  |  | 858,678 |  | 858,678 | 448,831 | 1,234,772 |
Share-based compensation arrangement by share-based payment award, shares issued in period |  | 23,007 |  | 147,783 |  |  |  |  |  |  |
Expected term |  | 10 years |  | 2 years |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, options, forfeitures and expirations in period |  |  |  |  |  | 56,482 |  | 204,265 |  |  |
Stock options, granted |  |  |  |  | 1,670,080 |  |  |  |  |  |
Exercise price per share | $ / shares |  | $ 4.36 |  |  |  |  |  |  |  |  |
Fair value of the stock options grant | € |  |  |  |  | € 352,364 |  | € 232,768 |  |  |  |
Unrecognized expense | € |  |  |  |  |  |  | 747,043 |  | € 2,652,303 |  |
Share-based payment arrangement, expense | € |  |  |  |  | 352,364 |  | 232,768 |  |  |  |
Share-based compensation | € |  |  |  |  | 424,360 |  | € 232,768 |  |  |  |
Share-based compensation expense | € |  |  |  |  | € 71,995 |  |  |  |  |  |
Exercise price | € / shares |  |  |  |  | € 3.83 |  |  | € 2.87 |  |  |
Options granted |  |  |  |  | 495,507 |  | 0 | 587,650 |  |  |
Weighted average number of shares outstanding, basic |  |  |  |  | 18,767,859 |  | 18,256,622 |  |  |  |
Weighted average number of shares outstanding, diluted |  |  |  |  | 18,767,859 |  | 18,256,622 |  |  |  |
Ordinary shares, par value | € / shares |  |  |  |  |  | € 0 |  | € 0 | € 0 |  |
Officers and Employee [Member] |  |  |  |  |  |  |  |  |  |  |
Shares purchased for award | 495,507 |  | 587,650 |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, terms of award | For the Chairman and CEO, the NSOs vest monthly over three (3) years and have a 10-year term. For the other two directors of the Company, the NSOs vest monthly over one (1) year, also with a 10-year term. The NSOs granted to officers and employees also have a 10-year term and vest monthly over three (3) years, except for employees with less than one (1) year of service, whose options include a one-year cliff vesting from the date of hire, followed by monthly vesting thereafter. |  | The directors’ NSOs vest immediately with a 10-year term. The officer and employee NSOs have a 10-year term and vest monthly over a three (3) year period, except that employees with less than one year of service have a one-year cliff vesting from the date of hire, and then monthly vesting thereafter. All options have an exercise price utilizing the stock price at the date of grant of $3.083 per share. |  |  |  |  |  |  |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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