Number of shares granted under common stock award.

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Represents the amount of excise tax liability accrued on stock repurchases.

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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 authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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 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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- Definition

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

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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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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- Definition

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

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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 remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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No definition available.

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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	12 Months Ended		139 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2022	Feb. 25, 2022	Feb. 24, 2022
Payments of Ordinary Dividends, Common Stock		$ 1,278,000	$ 1,333,000
Payments for Repurchase of Common Stock		2,172,000	$ 1,195,000
Excise Tax Liability Accrued on Stock Repurchases		$ 22,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		0
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
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)		(0)	2,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)		229,000	229,000	229,000	231,000
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 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
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
Share Repurchase Program, Remaining Authorized, Amount		$ 4,000,000		$ 4,000,000
O,2024,M1-12, Dividends [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)		$ 0.0075
O,2024,M13, Dividends [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
Common Class C [Member]
Common Stock, Shares, Issued (in shares)		2,068,549	2,068,549	2,068,549
Payments of Ordinary Dividends, Common Stock		$ 186,000
Common Class C [Member] \| Conversion of Class C to Class A [Member]
Conversion of Stock, Shares Converted (in shares)		0
Common Class A [Member]
Common Stock, Shares, Issued (in shares)		13,866,999	13,866,999	13,866,999
Payments of Ordinary Dividends, Common Stock		$ 1,100,000
Treasury Stock, Shares, Acquired (in shares)		767,651	412,257	1,988,877
Payments for Repurchase of Common Stock		$ 2,200,000	$ 1,200,000	$ 5,600,000
Common Stock Award, Number of Shares Granted (in shares)		0
Common Class A [Member] \| Plan 1997 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)		2,000		2,000