Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 5,208	$ 5,239	$ 5,072	$ 4,788	$ 5,262	$ 5,492	$ 5,288	$ 5,585	$ 20,307	$ 21,627
Total interest expense	880	1,100	1,198	1,242	1,311	1,463	1,444	1,413	4,420	5,631
Net interest income	4,328	4,139	3,874	3,546	3,951	4,029	3,844	4,172	15,887	15,996
(Recovery of) provision for loan losses	(1)	4	(1)	(102)	3	8	7	1	(100)	19
Total non-interest income	1,643	899	1,973	1,683	824	965	1,009	941	6,198	3,739
Total non-interest expense	6,937	6,344	6,657	6,143	6,570	6,422	5,896	6,251	26,081	25,139
Net loss	$ (965)	$ (1,310)	$ (809)	$ (812)	$ (1,798)	$ (1,436)	$ (1,050)	$ (1,139)	$ (3,896)	$ (5,423)
Earnings (Loss) Per Share, Basic (in dollars per share)	$ (0.27)	$ (0.44)	$ (0.21)	$ (0.22)	$ (0.49)	$ (0.39)	$ (0.28)	$ (0.31)	$ (1.14)	$ (1.47)
Earnings (Loss) Per Share, Diluted (in dollars per share)	$ (0.27)	$ (0.44)	$ (0.21)	$ (0.22)	$ (0.49)	$ (0.39)	$ (0.28)	$ (0.31)	$ (1.14)	$ (1.47)