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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 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Numerator:        
Net loss $ (1,248) $ (2,169) $ (3,472) $ (5,410)
Denominator:        
Basic weighted average shares outstanding (in shares) 23,952,555 19,449,283 23,933,033 19,002,758
Dilutive common stock equivalents using treasury stock method (in shares) 0 0 0 0
Diluted weighted average shares outstanding (in shares) 23,952,555 19,449,283 23,933,033 19,002,758
Basic loss per common share (in dollars per share) $ (0.05) $ (0.11) $ (0.15) $ (0.28)
Diluted loss per common share (in dollars per share) $ (0.05) $ (0.11) $ (0.15) $ (0.28)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares) 6,694,433 4,240,247 6,896,803 3,826,807
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares) 6,694,433 4,240,247 6,896,803 3,826,807