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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss	$ (1,351)	$ (1,248)	$ (3,202)	$ (3,472)
Denominator:
Basic weighted average shares outstanding (in shares)	23,960,313	23,952,555	23,957,311	23,933,033
Dilutive common stock equivalents using treasury stock method (in shares)	0	0	0	0
Diluted weighted average shares outstanding (in shares)	23,960,313	23,952,555	23,957,311	23,933,033
Basic loss per common share (in dollars per share)	$ (0.06)	$ (0.05)	$ (0.13)	$ (0.15)
Diluted loss per common share (in dollars per share)	$ (0.06)	$ (0.05)	$ (0.13)	$ (0.15)
Weighted average options, warrants and convertible portion of senior convertible notes outstanding (in shares)	6,294,994	6,694,433	6,316,137	6,896,803
Anti-dilutive options, warrants and convertible portion of senior convertible notes not included in the computation (in shares)	6,294,994	6,694,433	6,316,137	6,896,803