Income per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income	$ 647	$ 511	$ 955	$ 494
Denominator:
Weighted average common shares outstanding	5,244,000	5,206,000	5,234,000	5,194,000
Dilutive potential common shares	15,000	13,000	14,000	0
Shares used in diluted net income per common share calculations	5,259,000	5,219,000	5,248,000	5,194,000
Basic net income per common share	$ 0.12	$ 0.10	$ 0.18	$ 0.10
Diluted net income per common share	$ 0.12	$ 0.10	$ 0.18	$ 0.10
Shares excluded from diluted weighted shares outstanding	2,000	50,919	2,000	96,004