Incentive Plans - Additional Information (Details)	12 Months Ended	24 Months Ended
Jun. 30, 2023 USD ($) plan shares	Jun. 30, 2022 USD ($) shares	Jun. 30, 2023 USD ($) plan shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBased Compensation Arrangement By Share Based Payment Award Number Of Share Based Compensation Plans \| plan	4		4
Compensation cost \| $	$ 1,200,000	$ 798,000
Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, Exercised	0	0
Stock options, Granted	30,000	17,000
Stock options, Forfeited	7,500	0
Stock options, expired	19,000	3,000
Stock Option \| Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum term for stock awards			10 years
Term used to calculate expected volatility			84 months
Number of shares available for grant	21,000	43,500	21,000
Unrecognized share-based compensation expense, stock options \| $	$ 72,000	$ 94,000	$ 72,000
Share-based compensation cost not yet recognized, weighted average period for recognition (less than)	2 years 10 months 24 days	1 year 7 months 6 days
Forfeiture rate for equity incentive plans	20.00%	20.00%
Stock Option \| 2013 Equity Incentive Plan ("2013 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	300,000		300,000
Annual limitation on awards granted to an individual under Equity Incentive Plan			60,000
Stock Option \| 2022 Equity Incentive Plan ("2022 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	175,000		175,000
Annual limitation on awards granted to an individual under Equity Incentive Plan	35,000
Stock Option \| 2010 Equity Incentive Plan ("2010 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	586,250		586,250
Stock Option \| 2006 Equity Incentive Plan ("2006 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	365,000		365,000
Stock Option \| 2022 Equity Incentive Plan ("2022 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant	175,000		175,000
Restricted Stock \| Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years 1 month 6 days	10 months 24 days
Forfeiture rate for equity incentive plans			20.00%
Restricted stock, grants in period	53,000	1,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value \| $	$ 1,100,000	$ 17,000
Restricted stock, Forfeited	3,000	6,500
Restricted stock, Vesting and distribution	93,750	1,000
Unrecognized share-based compensation expense, restricted stock \| $	$ 544,000	$ 994,000	$ 544,000
Restricted Stock \| 2013 Equity Incentive Plan ("2013 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	300,000		300,000
Annual limitation on awards granted to an individual under Equity Incentive Plan			45,000
Number of shares available for grant	18,250	68,250	18,250
Restricted Stock \| 2022 Equity Incentive Plan ("2022 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	200,000		200,000
Annual limitation on awards granted to an individual under Equity Incentive Plan	30,000
Restricted Stock \| 2010 Equity Incentive Plan ("2010 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	288,750		288,750
Restricted Stock \| 2006 Equity Incentive Plan ("2006 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	185,000		185,000
Restricted Stock \| 2022 Equity Incentive Plan ("2022 Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for Equity Incentive Plan	200,000		200,000
Number of shares available for grant	200,000		200,000

Share-based Compensation Arrangement by Share-based Payment Award, Annual Limitation on Awards Granted to an Individual

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Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumption, Term Used to Calculate Expected Volatility

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Number of Share-based Compensation Plans

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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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).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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.

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Gross number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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