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Note 10 - Loss / (Gain) Per Common Share - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
(Loss) / Net Income $ 1,682 $ (2,868)
Less: Deemed dividend for beneficial conversion feature of Series E Shares 0 (1,067)
Less: Deemed dividend equivalents on Series E Shares related to redemption value 0 (3,099)
Less: Dividend of Series E Shares (915) (932)
(Loss) / gain attributable to common shareholders $ 767 $ (7,966)
Weighted average common shares outstanding, basic (in shares) 39,831,972 7,302,633
(Loss) / Earnings per share, basic and diluted (in dollars per share) $ 0.02 $ (1.09)