Fair Value Measurements - Fair value of Assets Measured on a Recurring Basis and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Nonrecurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed and repossessed assets held for sale	$ 280	$ 2,211
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	2,211
Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		41,988
Obligations of states and political subdivisions | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	47,696
Obligations of states and political subdivisions | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		41,988
Obligations of states and political subdivisions | Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	47,696
Corporate Obligations | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	20,311	6,659
Corporate Obligations | Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	20,311	6,659
Other securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		965
Other securities | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	672
Other securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		965
Other securities | Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	672
Residential MBS issued by governmental sponsored enterprises (GSEs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		126,912
Residential MBS issued by governmental sponsored enterprises (GSEs) | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	138,341
Residential MBS issued by governmental sponsored enterprises (GSEs) | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		$ 126,912
Residential MBS issued by governmental sponsored enterprises (GSEs) | Level 2 | Recurring Measurements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 138,341