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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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings (Loss) Per Share
Net loss	$ (1,586)	$ (1,937)	$ (3,241)	$ (3,784)
Basic weighted average shares outstanding (in shares)	18,775,817	16,650,774	18,775,795	16,650,750
Dilutive common stock equivalents using treasury stock method (in shares)
Diluted weighted average shares outstanding (in shares)	18,775,817	16,650,774	18,775,795	16,650,750
Basic loss per common share (in dollars per share)	$ (0.08)	$ (0.12)	$ (0.17)	$ (0.23)
Diluted loss per common share (in dollars per share)	$ (0.08)	$ (0.12)	$ (0.17)	$ (0.23)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares)	3,597,418	542,196	3,616,661	542,507
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares)	3,597,148	542,196	3,616,661	542,507

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