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Note 2 - Loss Per Share - Basic and Diluted Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Net loss $ (2,013) $ (6,258)
Weighted average shares outstanding (in shares) 79,161,367 79,608,513
Weighted average restricted shares vested not delivered (in shares) 1,727,684 2,284,080
Total basic weighted average shares outstanding (in shares) 80,889,052 81,892,593
Total diluted weighted average shares outstanding (in shares) 80,889,052 81,892,593
Basic (in dollars per share) $ (0.02) $ (0.08)
Diluted (in dollars per share) $ (0.02) $ (0.08)
Restricted Stock Units (RSUs) [Member]    
Dilutive effect of assumed conversion of share-based payment arrangement (in shares) 0 0