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Loss Per Share - Computation of Basic and Diluted Earnings (Loss) per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Numerator:    
Net loss $ (1,967) $ (1,655)
Denominator:    
Basic weighted average shares outstanding (in shares) 23,897,305 18,775,773
Dilutive common stock equivalents using treasury stock method (in shares) 0 0
Diluted weighted average shares outstanding (in shares) 23,897,305 18,775,773
Basic loss per common share (in dollars per share) $ (0.08) $ (0.09)
Diluted loss per common share (in dollars per share) $ (0.08) $ (0.09)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares) 7,062,673 3,636,117
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares) 7,062,673 3,636,117