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Note 10 - Shareholders' Equity (Details Textual) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Aug. 12, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) | 181,649 | 103,875 |
Proceeds from Stock Options Exercised | $ 555,000 | $ 257,000 |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) | 1,678 | 7,608 |
Stock Issued During Period, Shares Settlement of Deferred Stock Units |  | 142,345 |
A T M Offering [Member] |  |  |
Equity Issuance, Maximum Aggregate Offering Price |  |  | $ 100,000,000
Equity Issuance, Remaining Available Offering Price | $ 86,200,000 |  |

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