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Note 2 - (Loss) Income Per Share - Basic and Diluted Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Net (loss) income $ (2,452) $ 1,169 $ (13,889) $ 2,029
Weighted average shares outstanding (in shares) 78,441,740 76,315,973 77,866,621 76,111,405
Weighted average restricted shares vested not delivered (in shares) 1,691,666 2,262,001 1,887,041 2,452,857
Total basic weighted average shares outstanding (in shares) 80,133,406 78,577,974 79,753,662 78,564,262
Total diluted weighted average shares outstanding (in shares) 80,133,406 79,172,578 79,753,662 79,214,619
Basic (in dollars per share) $ (0.03) $ 0.01 $ (0.17) $ 0.03
Diluted (in dollars per share) $ (0.03) $ 0.01 $ (0.17) $ 0.03
Restricted Stock Units (RSUs) [Member]        
Dilutive effect of assumed conversion of share-based payment arrangement (in shares) 0 594,604 0 650,357