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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
	Mar. 31, 2021	Mar. 31, 2020
Earnings (Loss) Per Share
Net loss	$ (1,655)	$ (1,847)
Basic weighted average shares outstanding (in shares)	18,775,773	16,650,725
Dilutive common stock equivalents using treasury stock method (in shares)
Diluted weighted average shares outstanding (in shares)	18,775,773	16,650,725
Basic loss per common share (in dollars per share)	$ (0.09)	$ (0.11)
Diluted loss per common share (in dollars per share)	$ (0.09)	$ (0.11)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares)	3,636,117	542,818
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares)	3,636,117	542,818

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