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Employee Benefits - 2008 Equity Incentive Plan (Details) - USD ($) | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2017 | Jun. 30, 2012
Equity Incentive Plan Description | The Company adopted an Equity Incentive Plan (the EIP) in 2008, reserving for award 132,000 shares (split-adjusted). EIP shares were available for award to directors, officers, and employees of the Company and its affiliates by a committee of outside directors. |  |  |  |
Equity Incentive Plan Shares reserved | 132,000 |  |  |  |
Restricted Stock |  |  |  |  |
Equity Incentive Plan Shares Awarded |  |  |  | 0 | 122,803
Equity Incentive Plan vesting percentage | 20.00% |  |  |  |
Equity Incentive Plan Shares Vested | 2,700 | 2,825 | 7,100 |  |
Equity Incentive Plan Expense | $ 84,000 | $ 88,000 | $ 141,000 |  |
Equity Incentive Plan Unvested Compensation Expense | $ 51,000 |  |  |  |
Performance-based restricted stock |  |  |  |  |
Equity Incentive Plan vesting percentage | 20.00% |  |  |  |

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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