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Note 3 - Earnings Per Share - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Net (loss) income $ (1,210) $ 954
Weighted average number of common shares outstanding (in shares) 17,178,136 16,596,236
Basic net (loss) income per share (in dollars per share) $ (0.07) $ 0.06
Non-vested stock awards (in shares) [1] 137,038
Weighted average number of common shares outstanding (in shares) 17,178,136 16,733,274
Diluted net (loss) income per share (in dollars per share) $ (0.07) $ 0.06
[1] Restricted stock units granted and outstanding of 1,171,093 as of March 31, 2021, are excluded from the computation of diluted earnings due to the anti-dilutive effect as a result of the Company's net loss for the three months ended March 31, 2021.