Quarterly Results of Operations (Unaudited) (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 Results of Operations (Unaudited)
Interest income	$ 3,485	$ 3,349	$ 3,336	$ 3,499	$ 3,641	$ 3,590	$ 3,574	$ 3,709	$ 13,669	$ 14,514
Interest expense	313	353	398	451	461	446	450	570	1,515	1,927
Net interest income	3,172	2,996	2,938	3,048	3,180	3,144	3,124	3,139	12,154	12,587
Provision for credit losses	(427)	(669)	487	(80)	(179)	(139)	30	173	(689)	(115)
Net securities gains	6							3	6	3
Income before income taxes	712	1,232	(128)	343	676	818	386	171	2,159	2,051
Net income	$ 547	$ 949	$ (96)	$ 268	$ 539	$ 606	$ 319	$ 135	$ 1,668	$ 1,599
Net income per share (basic and diluted)	$ 0.20	$ 0.33	$ (0.03)	$ 0.09	$ 0.19	$ 0.21	$ 0.11	$ 0.05	$ 0.59	$ 0.57