Quarterly Data (Unaudited) - Summary of Quarterly Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 10,204	$ 9,996	$ 9,780	$ 10,397	$ 10,825	$ 11,027	$ 10,923	$ 10,813	$ 40,377	$ 43,588
Interest expense	912	1,031	1,157	1,511	1,636	1,680	1,690	1,640	4,611	6,646
Net interest income	9,292	8,965	8,623	8,886	9,189	9,347	9,233	9,173	35,766	36,942
Provision for loan and lease losses	469	1,046	850	580	716	883	715	400	2,945	2,714
Net interest income after provision for loan and lease losses	8,823	7,919	7,773	8,306	8,473	8,464	8,518	8,773	32,821	34,228
Non-interest income:
Income	1,008	1,375	1,330	1,297	1,396	1,414	1,291	1,265	5,010	5,366
Expense	8,477	8,747	8,581	8,494	8,279	8,546	8,504	8,453	34,299	33,782
Income before income taxes	1,354	547	522	1,109	1,590	1,332	1,305	1,585
Provision for income taxes	309	136	118	262	381	214	300	351	825	1,246
Net income (loss)	$ 1,045	$ 411	$ 404	$ 847	$ 1,209	$ 1,118	$ 1,005	$ 1,234	$ 2,707	$ 4,566
Earnings per common share:
Basic earnings	$ 0.16	$ 0.07	$ 0.07	$ 0.13	$ 0.19	$ 0.17	$ 0.16	$ 0.19	$ 0.43	$ 0.71
Diluted earnings	$ 0.15	$ 0.06	$ 0.06	$ 0.13	$ 0.18	$ 0.16	$ 0.15	$ 0.18	$ 0.40	$ 0.67