Note 1 - Description of Business and Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Cash Equivalents, at Carrying Value | $ 8,403 | $ 8,889 |
| Percentage of Concentration Risk Credit Risk Financial Instruments Under Option One | 5.00% | |
| Concentration Risk Credit Risk Financial Instruments Under Option Two | $ 1,000 | |
| Percentage of Credit Exposure Limits Based on Cash and Cash Equivalents and Marketable Securities | 40.00% | |
| Credit Exposure Limits of Cash and Cash Equivalents and Marketable Securities Under Option Two | $ 15,000 |