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Note 2 - Income Per Share - Basic and Diluted Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Net income $ 452 $ 715 $ 860 $ 1,760
Weighted average shares outstanding (in shares) 76,244,975 76,487,160 76,007,997 76,056,652
Weighted average restricted shares vested not delivered (in shares) 2,265,408 2,901,223 2,549,334 3,240,947
Total basic weighted average shares outstanding (in shares) 78,510,383 79,388,383 78,557,331 79,297,599
Dilutive effect of assumed conversion of warrants (in shares) 0 329,808 0 262,567
Total diluted weighted average shares outstanding (in shares) 78,666,776 81,132,304 78,905,792 80,443,530
Basic (in dollars per share) $ 0.01 $ 0.01 $ 0.01 $ 0.02
Diluted (in dollars per share) $ 0.01 $ 0.01 $ 0.01 $ 0.02
Restricted Stock Units (RSUs) [Member]        
Dilutive effect of assumed conversion of share-based payment arrangement (in shares) 156,393 1,408,277 348,461 882,263
Share-based Payment Arrangement, Option [Member]        
Dilutive effect of assumed conversion of share-based payment arrangement (in shares) 0 5,836 0 1,101