8. Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income (numerator for basic and diluted earnings per share)	$ 650	$ 600	$ 1,153	$ 650
Denominator:
Denominator for basic earnings per share weighted average shares	13,479,759	13,665,976	13,538,116	13,602,207
Effect of dilutive securities:
Options and restricted stock units	21,828	22,321	25,874	102,677
Denominator
Denominator for diluted earnings per share weighted average shares	13,501,587	13,688,297	13,563,990	13,704,884
Basic income per share	$ 0.05	$ 0.04	$ 0.09	$ 0.05
Diluted income per share	$ 0.05	$ 0.04	$ 0.09	$ 0.05