Income (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
Numerator:
Net income	$ 150	$ 647	$ 39	$ 955
Denominator:
Weighted average common shares outstanding	5,296	5,244	5,281	5,234
Dilutive potential common shares	3	15	18	14
Shares used in diluted net income per common share calculations	5,299	5,259	5,299	5,248
Basic net income per common share	$ 0.03	$ 0.12	$ 0.01	$ 0.18
Diluted net income per common share	$ 0.03	$ 0.12	$ 0.01	$ 0.18
Shares excluded from diluted weighted shares outstanding	15,000	2,000	5,000	2,000