Advances from Federal Home Loan Bank - Components (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	$ 41,000	$ 64,892
Convertible
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	20,000	20,000
Fixed
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	14,000	21,767
Mid-term
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	$ 7,000	$ 23,125