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Note 2 - Income Per Share - Calculation of Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Numerators:    
Income from continuing operations $ 3,824 $ 16,485
Income from discontinued operations 150 150
Net income $ 3,974 $ 16,635
Denominator:    
Denominator for basic income per share – weighted-average shares (in shares) 13,087,000 13,361,000
Effect of dilutive securities:    
Diluted weighted average shares outstanding (in shares) 13,800,000 13,877,000
Basic income per share(1):    
Income from continuing operations (in dollars per share) $ 0.29 $ 1.23
Income from discontinued operations (in dollars per share) 0.01 0.01
Net income per share (in dollars per share) 0.3 1.25
Diluted income per share:    
Income from continuing operations (in dollars per share) 0.28 1.19
Income from discontinued operations (in dollars per share) 0.01 0.01
Net income per share (in dollars per share) $ 0.29 $ 1.2
Restricted Stock [Member]    
Effect of dilutive securities:    
Equivalent shares issuable upon conversion of unvested restricted shares (in shares) 79,000 288,000
Share-Based Payment Arrangement, Option [Member]    
Effect of dilutive securities:    
Equivalent shares issuable upon conversion of unvested restricted shares (in shares) 634,000 228,000