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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, 2023
Mar. 31, 2022
Numerator:    
Net loss $ (832) $ (1,967)
Denominator:    
Basic weighted average shares outstanding (in shares) 23,955,767 23,897,305
Dilutive common stock equivalents using treasury stock method (in shares) 0 0
Diluted weighted average shares outstanding (in shares) 23,955,767 23,897,305
Basic loss per common share (in dollars per share) $ (0.03) $ (0.08)
Diluted loss per common share (in dollars per share) $ (0.03) $ (0.08)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares) 6,368,420 7,062,673
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares) 6,368,420 7,062,673