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Loss Per Common Share - Schedule of Loss Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]      
Net loss available to common stockholders $ (6,982) $ (8,330) $ (8,214)
Weighted average number of common shares, basic and diluted 21,548,126 21,161,164 20,894,202
Loss per common share, basic and diluted $ (0.32) $ (0.39) $ (0.39)