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Note 14 - Net Income Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Net income (loss), parent $ 2,419 $ (1,551)
Shares used in basic net income per share calculation (in shares) 20,916 20,684
Stock options and unvested restricted shares (in shares) 241
Shares used in diluted net income per share calculations (in shares) 21,157 20,684
Basic net income (loss) per common share: (in dollars per share) $ 0.12 $ (0.07)
Diluted net income (loss) per common share: (in dollars per share) $ 0.11 $ (0.07)