Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income	$ 3,317	$ 2,022	$ 2,006	$ 2,727	$ 1,802	$ 1,270	$ 7,345	$ 5,799
Denominator for basic earnings per share - weighted average shares outstanding	6,407			6,402			6,407	6,395
Effect of dilutive common shares	30			28			29	31
Denominator for diluted earnings per share - adjusted weighted average shares outstanding	6,437			6,430			6,436	6,426
Basic earnings per share (in dollars per share)	$ 0.52			$ 0.43			$ 1.15	$ 0.91
Diluted earnings per share (in dollars per share)	$ 0.52			$ 0.42			$ 1.14	$ 0.90
Antidilutive shares excluded from computation of average dilutive earnings per share	199			116			199	116