Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) Pure in Thousands, $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Impairment of Marketable Securities | $ 0 | $ 0 | $ 0 | $ 0 | |
| Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 | $ 0 | $ 0 | ||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period | 10 years | ||||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 0.00% | ||||