Note 8 - Convertible Notes Payable at Fair Value - Summary of Valuation Assumption (Details) |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Euro Member Countries, Euro | ||
| Foreign exchange rate at year end USD/EUR | 1.177 | 1.0389 |
| Measurement Input, Share Price [Member] | ||
| Debt Instrument, Measurement Input | 3.6 | 4.18 |
| Measurement Input, Exercise Price [Member] | ||
| Debt Instrument, Measurement Input | 4 | 1.75 |
| Measurement Input, Price Volatility [Member] | ||
| Debt Instrument, Measurement Input | 1.50 | 1.50 |
| Measurement Input, Expected Term [Member] | ||
| Debt Instrument, Measurement Input | 0.25 | 1 |
| Measurement Input, Risk Free Interest Rate [Member] | ||
| Debt Instrument, Measurement Input | 0.0411 | 0.0418 |