Regulatory Capital Matters - Schedule of actual and required capital amounts for the bank and ratios (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Tier I capital (to average assets), Amount [Abstract]
Banking Regulation, Tier One Leverage Capital, Actual	$ 70,979	$ 69,739
To be well	$ 31,130	$ 31,476
Tier I capital (to average assets), Ratio [Abstract]
Community bank leverage ratio minimum requirement	0.204	0.188
To be well	0.0900	0.0850