Note 7 - Income Taxes - Foreign Rate Differentials (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Income tax at U.S. federal statutory tax rate, percent | 21.00% | 21.00% |
| Foreign, amount | $ 160 | $ 1,613 |
| Department for International Tax Cooperation [Member] | ||
| Income tax at U.S. federal statutory tax rate, percent | 0.00% | |
| Foreign, amount | $ 759 | 1,535 |
| Inland Revenue, Hong Kong [Member] | ||
| Income tax at U.S. federal statutory tax rate, percent | 16.50% | |
| Foreign, amount | $ 444 | 745 |
| State Administration of Taxation, China [Member] | ||
| Income tax at U.S. federal statutory tax rate, percent | 5.00% | |
| Foreign, amount | $ (439) | $ (124) |
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
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