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Note 4 - Share Repurchase Program (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Oct. 31, 2019 | Dec. 31, 2018 | Nov. 01, 2018
Treasury Stock, Shares, Acquired (in shares) | 0 | 267,300 | 372,974 | 105,674 |
Treasury Stock, Value, Acquired, Cost Method |  | $ 1,957 | $ 2,699 | $ 742 |
Maximum [Member] |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) |  |  |  |  | 2,500,000

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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