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Earnings (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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings (Loss) Per Share
Net loss	$ (2,169)	$ (1,260)	$ (5,410)	$ (5,044)
Basic weighted average shares outstanding (in shares)	19,449,283	17,000,215	19,002,758	16,768,088
Dilutive common stock equivalents using treasury stock method (in shares)
Diluted weighted average shares outstanding (in shares)	19,449,283	17,000,215	19,002,758	16,768,088
Basic loss per common share (in dollars per share)	$ (0.11)	$ (0.07)	$ (0.28)	$ (0.30)
Diluted loss per common share (in dollars per share)	$ (0.11)	$ (0.07)	$ (0.28)	$ (0.30)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares)	4,240,247	511,332	3,826,807	528,107
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares)	4,240,247	511,332	3,826,807	528,107

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