Advances from Federal Home Loan Bank - Components (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	$ 34,000	$ 41,000
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	14,000
Mid-term
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances		$ 7,000