Note 9 - Employee Defined Contribution Plan (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Defined Contribution Plan, Cost | $ 1 | $ 17 | $ 3 | $ 33 |
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% | |||
| Pension Plan [Member] | ||||
| Defined Contribution Plan, Cost | $ 16 | $ 14 | $ 32 | $ 29 |