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The weighted average grant-date fair value of options outstanding as of the reporting period as calculated by applying the disclosed option pricing methodology.

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

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount of cost to be recognized for option under share-based payment arrangement.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Number of shares authorized for issuance under share-based payment arrangement.

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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Percentage of vesting of award under share-based payment arrangement.

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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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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Note 12 - Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended			127 Months Ended
	Sep. 30, 2023	Sep. 30, 2021	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2023	Feb. 25, 2022	Feb. 24, 2022
Payments of Ordinary Dividends, Common Stock				$ 1,333,000	$ 1,239,000
Payments for Repurchase of Common Stock				1,195,000	452,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost			$ 164,000	162,000	164,000		$ 162,000
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount				$ 0			$ 0
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense					733,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost			$ 154,000		$ 154,000
Plan 1989 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)				1,600,000			1,600,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)				10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				0	0	231,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)						$ 3.36
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)				2,000	(0)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)			231,000	229,000	231,000	231,000	229,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value (in dollars per share)				$ 3.36			$ 3.36
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)				(0)	(0)
Plan 1989 [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage				20.00%
Plan 1989 [Member] \| Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage				20.00%
Plan 1989 [Member] \| Share-Based Payment Arrangement, Tranche Four [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage				20.00%
Plan 1989 [Member] \| Share-Based Payment Arrangement, Tranche Five [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage				20.00%
Plan 1997 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)				400,000			400,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)				0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)				(0)	(0)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)			2,000	2,000	2,000	2,000	2,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)				(0)	(0)
Plan 1997 [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)					10 years
Share Repurchase Plan Renewal December2012 December2020 [Member]
Stock Repurchase Program, Authorized Amount				$ 5,000,000			$ 5,000,000	$ 5,000,000	$ 2,750,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 4,200,000			$ 4,200,000
Monthly Dividends Paid [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)		$ 0.005	$ 0.0075
Monthly Dividends Paid [Member] \| Forecast [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.0075
Common Class B [Member]
Common Stock, Shares, Issued (in shares)			0	0	0		0
Common Class C [Member]
Common Stock, Shares, Issued (in shares)			2,068,549	2,068,549	2,068,549		2,068,549
Payments of Ordinary Dividends, Common Stock				$ 186,000	$ 171,000
Common Class C [Member] \| Conversion of Class C to Class A [Member]
Conversion of Stock, Shares Converted (in shares)				0	86
Common Class A [Member]
Common Stock, Shares, Issued (in shares)			13,866,999	13,866,999	13,866,999		13,866,999
Payments of Ordinary Dividends, Common Stock				$ 1,100,000	$ 1,100,000
Treasury Stock, Shares, Acquired (in shares)				412,257	89,287		1,221,226
Payments for Repurchase of Common Stock				$ 1,200,000	$ 452,000		$ 3,400,000
Common Stock Award, Number of Shares Granted (in shares)				0	0
Common Class A [Member] \| Conversion of Class C to Class A [Member]
Conversion of Stock, Shares Issued (in shares)				0	86