Note 9 - Employee Defined Contribution Plan (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Defined Contribution Plan, Cost | $ 1 | $ 16 |
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% | |
| Pension Plan [Member] | ||
| Defined Contribution Plan, Cost | $ 16 | $ 14 |