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Deposits - Weighted-average interest rates (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Jun. 30, 2020
Deposits.    
Non-interest bearing checking $ 51,086 $ 43,395
Interest bearing checking 104,214 98,828
Money market accounts 136,719 129,048
Savings and club accounts 100,781 94,097
Certificates of deposit 160,303 194,480
Total deposits $ 553,103 $ 559,848
Weighted Average Rate    
Interest bearing checking 0.08% 0.19%
Money market accounts 0.33% 0.94%
Savings and club accounts 0.10% 0.19%
Certificates of deposit 1.18% 1.86%
Total deposits 0.45% 0.93%