Quarterly Results of Operations (Unaudited) - Summary (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2022	Mar. 31, 2021
Quarterly Financial Data [Abstract]
Total revenue	$ 12,373	$ 12,240	$ 12,572	$ 12,594	$ 13,286	$ 14,474	$ 14,109	$ 14,151
Interest expense	444	2,613	1,121	1,188	1,320	1,442	1,569	1,649	$ 5,366	$ 5,980
Provision for credit losses	2,165	1,675	1,395	730	250	650	3,050	3,300	5,965	7,250
Non-interest expense	9,274	8,863	7,917	8,348	8,963	7,407	8,131	7,343
Operating income before income taxes	490	(911)	2,139	2,328	2,753	4,975	1,359	1,859	4,046	10,946
Income tax expense (benefit)	122	(209)	536	599	884	1,190	92	429	1,048	2,595
Net income (loss)	$ 368	$ (702)	$ 1,603	$ 1,729	$ 1,869	$ 3,785	$ 1,267	$ 1,430	$ 2,998	$ 8,351
Earnings per share:
Basic	$ 0.05	$ (0.09)	$ 0.21	$ 0.22	$ 0.24	$ 0.49	$ 0.16	$ 0.18	$ 0.39	$ 1.09
Diluted	$ 0.05	$ (0.09)	$ 0.21	$ 0.22	$ 0.24	$ 0.49	$ 0.16	$ 0.18	$ 0.39	$ 1.09