Note 6 - Stock-based Compensation Expense - 10Q (Details Textual) - USD ($) |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ 1,300,000 | $ 1,371,524 |
| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition | 1 year 8 months 12 days | 2 years |