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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, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings (Loss) Per Share
Net loss	$ (1,937)	$ (2,098)	$ (3,784)	$ (4,447)
Basic weighted average shares outstanding (in shares)	16,650,774	16,630,770	16,650,750	16,630,684
Dilutive common stock equivalents using treasury stock method (in shares)
Diluted weighted average shares outstanding (in shares)	16,650,774	16,630,770	16,650,750	16,630,684
Basic loss per common share (in dollars per share)	$ (0.12)	$ (0.13)	$ (0.23)	$ (0.27)
Diluted loss per common share (in dollars per share)	$ (0.12)	$ (0.13)	$ (0.23)	$ (0.27)
Weighted average options outstanding (in shares)	542,196	569,997	542,507	578,543
Anti-dilutive options not included in the computations (in shares)	542,196	569,997	542,507	578,543

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