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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net loss	$ (1,019)	$ (257)	$ (1,851)	$ (2,224)
Denominator:
Basic weighted average shares outstanding (in shares)	23,955,802	23,948,631	23,955,785	23,923,110
Dilutive common stock equivalents using treasury stock method (in shares)	0	0	0	0
Diluted weighted average shares outstanding (in shares)	23,955,802	23,948,631	23,955,785	23,923,110
Basic loss per common share (in dollars per share)	$ (0.04)	$ (0.01)	$ (0.08)	$ (0.09)
Diluted loss per common share (in dollars per share)	$ (0.04)	$ (0.01)	$ (0.08)	$ (0.09)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares)	6,287,019	6,937,350	6,327,495	6,999,665
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares)	6,287,019	6,937,350	6,327,495	6,999,665