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Note 3 - Earnings Per Share - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Net loss $ (2,404) $ (1,210) $ 1,653
Weighted average number of common shares outstanding (in shares) 19,707,815 17,178,136  
Net income per common share-basic (in dollars per share) $ (0.12) $ (0.07) $ 0.09
Non-vested stock awards (1) (in shares) [1] 0 0  
Weighted average number of common shares outstanding (in shares) 19,707,815 17,178,136  
Net income per common share-diluted (in dollars per share) $ (0.12) $ (0.07) $ 0.08
[1] Restricted stock units granted and outstanding of 623,191 and 1,171,093 as of March 31, 2022 and 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, 2022 and 2021.