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Employee Benefits - 2017 Omnibus Incentive Plan (Details) | 12 Months Ended |
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Jun. 30, 2024 USD ($) shares | Jun. 30, 2023 USD ($) shares | Jun. 30, 2022 USD ($) shares | Jun. 30, 2021 shares
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Common stock reserve for issuance | 132,000 |  |  |
Granted | 23,500 | 44,000 | 14,500 |
Exercised | 16,000 | 0 | 0 |
Forfeited | 15,000 |  |  |
Outstanding | 140,500 | 148,000 | 104,000 | 89,500
Options Exercisable, Number | 65,800 | 63,700 | 44,900 |
Equity Incentive Plan vesting percentage | 20.00% |  |  |
Restricted Stock [Member] |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Equity Incentive Plan vesting percentage | 20.00% |  |  |
Omnibus Incentive Plan 2017 |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
2017 Omnibus Incentive Plan Description | The Company adopted an equity-based incentive plan in October 2017 (the 2017 Plan). Under the 2017 plan, the Company reserved for issuance 500,000 shares of common stock for awards to employees and directors, against which full value awards (stock-based awards other than stock options and stock appreciation rights) are to be counted on a 2.5-for-1 basis. The 2017 Plan authorized awards to be made to employees, officers, and directors by a committee of outside directors. The committee held the power to set vesting requirements for each award under the 2017 Plan. Under the 2017 Plan, stock awards and shares issued pursuant to exercised options may be issued from either authorized but unissued shares, or treasury shares. |  |  |
Common stock reserve for issuance | 500,000 |  |  |
Full value awards basis | 2.5 |  |  |
Granted | 161,500 |  |  |
Exercised | 6,000 |  |  |
Forfeited | 15,000 |  |  |
Outstanding | 140,500 |  |  |
Unrecognized compensation cost | $ | $ 1,000,000.0 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value | $ | 704,000 |  |  |
Stock Option Plan Intrinsic Value of Options Vested | $ | $ 126,000 | $ 42,000 | $ 150,000 |
Options Exercisable, Number | 12,600 |  |  |
Full value awards issued | 26,600 | 28,650 | 22,350 |
Full value awards vested | 16,624 | 15,140 | 12,860 |
Share based compensation expense | $ | $ 903,000 | $ 833,000 | $ 548,000 |
Unvested compensation cost for full value awards | $ | $ 2,500,000 |  |  |
Omnibus Incentive Plan 2017 | Restricted Stock [Member] |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Achievement of specified profitability targets period | 3 years |  |  |
Omnibus Incentive Plan 2017 | Performance-based restricted stock |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Equity Incentive Plan vesting percentage | 20.00% |  |  |
Achievement of specified profitability targets period | 3 years |  |  |
Omnibus Incentive Plan 2017 | Share-Based Payment Arrangement, Tranche One [Member] | Restricted Stock [Member] |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Equity Incentive Plan vesting percentage | 20.00% |  |  |
Omnibus Incentive Plan 2017 | Share-Based Payment Arrangement, Tranche Two [Member] | Restricted Stock [Member] |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |
Equity Incentive Plan vesting percentage | 33.33% |  |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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