Note 2 - Liquidity and Going Concern Assessment (Details Textual) - USD ($) |
6 Months Ended | 45 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 10, 2025 |
|
| Statement Line Items [Line Items] | ||||
| Issued capital | $ 15,791,000 | $ 15,791,000 | ||
| Issue of equity | $ 17,828,000 | |||
| Ordinary shares [member] | ||||
| Statement Line Items [Line Items] | ||||
| Number of shares outstanding (in shares) | 344,711,416 | |||
| JonesTrading Institutional Services LLC [member] | American depository share [member] | ||||
| Statement Line Items [Line Items] | ||||
| Issued capital | $ 75,900,000 | |||
| Number of shares outstanding (in shares) | 6,894,228 | |||
| Shares outstanding, price per share (in dollars per share) | $ 11.01 | |||
| Issue of equity | 4,472,175.8 | |||
| Purchase agreement, maximum aggregate amount | $ 45,520,000 | |||
| JonesTrading Institutional Services LLC [member] | American depository share [member] | Bottom of range [member] | ||||
| Statement Line Items [Line Items] | ||||
| Issued capital | $ 75,000,000 |