Fair Value of Financial Instruments - Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Investments available for sale:
Fair value	$ 123,335	$ 89,998
Mortgage-backed securities
Investments available for sale:
Fair value	55,064	51,738
U.S. agency collateralized mortgage obligations
Investments available for sale:
Fair value	15,433	3,215
U.S. government agency securities
Investments available for sale:
Fair value	6,896	6,155
U.S treasury securities
Investments available for sale:
Fair value		1,000
Municipal bonds
Investments available for sale:
Fair value	19,861	10,508
Corporate bonds
Investments available for sale:
Fair value	26,081	17,382
Recurring
Investments available for sale:
Fair value	123,335	89,998
Recurring | Mortgage-backed securities
Investments available for sale:
Fair value	55,064	51,738
Recurring | U.S. agency collateralized mortgage obligations
Investments available for sale:
Fair value	15,433	3,215
Recurring | U.S. government agency securities
Investments available for sale:
Fair value	6,896	6,155
Recurring | U.S treasury securities
Investments available for sale:
Fair value		1,000
Recurring | Municipal bonds
Investments available for sale:
Fair value	19,861	10,508
Recurring | Corporate bonds
Investments available for sale:
Fair value	26,081	17,382
Recurring | Level 2
Investments available for sale:
Fair value	123,335	89,998
Recurring | Level 2 | Mortgage-backed securities
Investments available for sale:
Fair value	55,064	51,738
Recurring | Level 2 | U.S. agency collateralized mortgage obligations
Investments available for sale:
Fair value	15,433	3,215
Recurring | Level 2 | U.S. government agency securities
Investments available for sale:
Fair value	6,896	6,155
Recurring | Level 2 | U.S treasury securities
Investments available for sale:
Fair value		1,000
Recurring | Level 2 | Municipal bonds
Investments available for sale:
Fair value	19,861	10,508
Recurring | Level 2 | Corporate bonds
Investments available for sale:
Fair value	$ 26,081	$ 17,382