Fair Value of Financial Instruments - Quantitative Information (Details) - Non-recurring basis $ in Thousands	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)
Assets at fair value
Fair value estimate	$ 0	$ 290
Level 3
Assets at fair value
Fair value estimate		290
Impaired loans
Assets at fair value
Fair value estimate		190
Impaired loans | Level 3
Assets at fair value
Fair value estimate		190
Impaired loans | Level 3 | Appraisal adjustments
Assets at fair value
Fair value estimate		$ 190
Impaired loans | Level 3 | Appraisal adjustments | Minimum [Member]
Assets at fair value
Measurement input		0
Impaired loans | Level 3 | Appraisal adjustments | Maximum [Member]
Assets at fair value
Measurement input		28
Other real estate owned
Assets at fair value
Fair value estimate		$ 100
Other real estate owned | Level 3
Assets at fair value
Fair value estimate		100
Other real estate owned | Level 3 | Liquidation expenses
Assets at fair value
Fair value estimate		$ 100
Measurement input		0