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Note 13 - Shares Outstanding and Earnings Per Share - Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Weighted average basic shares outstanding (in shares) 11,662 11,569 11,663 11,570
Assumed exercise of stock options and issuance of stock awards (in shares) 0 3 0 2
Weighted average diluted shares outstanding (in shares) 11,662 11,572 11,663 11,572
Net income $ 7,660 $ 15,019 $ 16,357 $ 24,891
Basic earnings per share (in dollars per share) $ 0.66 $ 1.3 $ 1.4 $ 2.15
Diluted earnings per share (in dollars per share) $ 0.66 $ 1.3 $ 1.4 $ 2.15
Unvested RSs and RSUs (in shares) 164 226 164 226