Quarterly Financial Information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net interest income	$ 9,607	$ 9,247	$ 9,133	$ 8,677		$ 8,477	$ 8,348	$ 8,083	$ 7,298	$ 36,666	$ 32,206	$ 27,805
Provision for loan losses (recovery) (Note 4)	215	602	337	94		1,219	238	207	52	1,249	1,716	(57)
Net interest income after provision for loan losses	9,392	8,645	8,796	8,583		7,258	8,110	7,876	7,246	35,417	30,490	27,862
Non-interest income	815	714	524	885		694	768	884	758	2,938	3,104	2,431
Non-interest expense	9,074	8,769	8,455	8,259		8,736	13,730	6,995	7,096	34,557	36,557	27,863
Income (loss) before income taxes	1,133	590	865	1,209		(784)	(4,852)	1,765	908	3,798	(2,963)	2,430
Income tax (benefit)	498	188	166	268		2,081	(1,643)	641	345	1,121	1,424	1,005
Net income (loss)	$ 635	$ 402	$ 699	$ 941	$ (2,864)	$ (2,865)	$ (3,209)	$ 1,124	$ 563	$ 2,677	$ (4,387)	$ 1,425
Basic earnings per share	$ 0.04	$ 0.02	$ 0.04	$ 0.05	$ (0.16)	$ (0.16)				$ 0.15	$ (0.16)
Diluted earnings per share	$ 0.04	$ 0.02	$ 0.04	$ 0.05	$ (0.16)	$ (0.16)				$ 0.15	$ (0.16)
Basic weighted average common shares	17,823,847	17,811,784	17,799,723	17,787,661	17,739,796	17,739,796				17,823,847
Diluted weighted average common shares	17,832,966				17,739,796					17,832,966