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Note 2 - Income (Loss) Per Share - Calculation of Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Numerators:                
Income (loss) from continuing operations $ 4,713     $ (4,042)     $ (21,540) $ 4,961
Income from discontinued operations 2,788     853     4,485 2,354
Net Income (Loss) Attributable to Parent, Total $ 7,501 $ (22,343) $ (2,213) $ (3,189) $ 6,071 $ 4,433 $ (17,055) $ 7,315
Denominator:                
Denominator for basic income (loss) per share – weighted-average shares (in shares) 17,134     18,458     17,435 18,426
Effect of dilutive securities:                
Equivalent shares issuable upon conversion of unvested restricted shares (in shares) 133     0     0 194
Diluted weighted average shares outstanding (in shares) 17,267     18,458     17,435 18,620
Basic income (loss) per share:                
Income (loss) from continuing operations (in dollars per share) $ 0.28     $ (0.22)     $ (1.24) $ 0.27
Income from discontinued operations (in dollars per share) 0.16     0.05     0.26 0.13
Net income (loss)(1) (in dollars per share) [1] 0.44     (0.17)     (0.98) 0.40
Diluted income (loss) per share:                
Income (loss) from continuing operations (in dollars per share) 0.27     (0.22)     (1.24) 0.27
Income from discontinued operations (in dollars per share) 0.16     0.05     0.26 0.13
Earnings Per Share, Diluted, Total (in dollars per share) [1] $ 0.43     $ (0.17)     $ (0.98) $ 0.39
[1] Sum of the individual amounts may not add due to rounding.