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Note 1 - Summary of Significant Accounting Policies - Calculation of Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Numerators:      
Income from continuing operations $ 35,321 $ 54,629 $ 107,932
Income from discontinued operations, net of tax 600 600 750
Net income (loss) $ 35,921 $ 55,229 $ 108,682
Denominator:      
Denominator for basic income per share – weighted-average shares (in shares) 26,307 26,096 30,012
Effect of dilutive securities:      
Diluted weighted average shares outstanding (in shares) 27,714 27,668 31,048
Basic income per share:      
Income from continuing operations (in dollars per share) $ 1.35 $ 2.09 $ 3.6
Income from discontinued operations (in dollars per share) 0.02 0.02 0.02
Net income per basic share(1) (in dollars per share) [1] 1.37 2.12 3.62
Diluted income per share:      
Income from continuing operations (in dollars per share) 1.28 1.97 3.48
Income from discontinued operations (in dollars per share) 0.02 0.02 0.02
Net income per diluted share (in dollars per share) $ 1.3 $ 2 $ 3.5
Restricted Stock [Member]      
Effect of dilutive securities:      
Equivalent shares issuable upon conversion of unvested restricted shares (in shares) 161 489 715
Share-Based Payment Arrangement, Option [Member]      
Effect of dilutive securities:      
Equivalent shares issuable upon conversion of unvested restricted shares (in shares) 1,246 1,083 321
[1] Total may not sum due to rounding.