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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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings (Loss) Per Share
Net loss	$ (1,260)	$ (1,976)	$ (5,044)	$ (6,423)
Basic weighted average shares outstanding (in shares)	17,000,215	16,646,323	16,768,088	16,635,954
Dilutive common stock equivalents using treasury stock method (in shares)
Diluted weighted average shares outstanding (in shares)	17,000,215	16,646,323	16,768,088	16,635,954
Basic loss per common share (in dollars per share)	$ (0.07)	$ (0.12)	$ (0.30)	$ (0.39)
Diluted loss per common share (in dollars per share)	$ (0.07)	$ (0.12)	$ (0.30)	$ (0.39)
Weighted average options outstanding (in shares)	511,332	561,634	528,107	572,845
Anti-dilutive options not included in the computations (in shares)	511,332	561,634	528,107	572,845

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