Note 6 - Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Details) - USD ($) |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Total stock-based compensation expense | $ 1,115,154 | $ 528,644 | ||||
| Share-Based Payment Arrangement, Option [Member] | ||||||
| Total stock-based compensation expense | $ 163,746 | $ 292,740 | $ 383,063 | $ 585,484 | 1,110,987 | 474,477 |
| Share-Based Payment Arrangement, Option [Member] | Research and Development Expense [Member] (Deprecated 2026) | ||||||
| Total stock-based compensation expense | 513,867 | 222,202 | ||||
| Share-Based Payment Arrangement, Option [Member] | General and Administrative Expense [Member] (Deprecated 2026) | ||||||
| Total stock-based compensation expense | 597,120 | 252,275 | ||||
| Restricted Stock [Member] | General and Administrative Expense [Member] (Deprecated 2026) | ||||||
| Total stock-based compensation expense | $ 4,167 | $ 54,167 | ||||