Fair Value Measurements - Fair value of Assets Measured on a Recurring Basis and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Nonrecurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed and repossessed assets held for sale		$ 280
Fair Value, Inputs, Level 3 | Nonrecurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed and repossessed assets held for sale		280
US States and Political Subdivisions Debt Securities | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 44,479	47,696
US States and Political Subdivisions Debt Securities | Fair Value, Inputs, Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	44,479	47,696
Corporate Obligations | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	19,887	20,311
Corporate Obligations | Fair Value, Inputs, Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	19,887	20,311
Other Debt Obligations | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	443	672
Other Debt Obligations | Fair Value, Inputs, Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	443	672
Total MBS and CMOs | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	170,585	138,341
Total MBS and CMOs | Fair Value, Inputs, Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 170,585	$ 138,341