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Note 5 - Stockholders' Equity (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 01, 2023 | Nov. 02, 2023
Stock Repurchased and Retired During Period, Value |  |  | $ 4,301 |  |  |
Share Repurchase Program [Member] |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 30,000
Rule 10b5-1 Trading Plan, Designated Amount |  |  |  |  | $ 10,000 |
Stock Repurchased and Retired During Period, Shares (in shares) | 0 | 0 | 145,000 | 0 |  |
Stock Repurchased and Retired During Period, Value |  |  | $ 4,300 |  |  |
Share Repurchase Program, Remaining Authorized, Amount | $ 24,900 |  | $ 24,900 |  |  |

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