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The cash outflow to reacquire common stock during the period.

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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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Note 12 - Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended	7 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended		115 Months Ended
	Sep. 30, 2022	Jan. 31, 2021	Sep. 30, 2021	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Feb. 25, 2022	Feb. 24, 2022	Jun. 30, 2020
Payments of Ordinary Dividends, Common Stock					$ 1,239,000	$ 640,000
Payments for Repurchase of Common Stock					452,000	314,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost				$ 164,000	164,000	0	$ 164,000
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount				0	0	733,000	0
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense					733,000	43,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost				$ 154,000	$ 154,000	$ 9,000	$ 154,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						5 months 19 days
Plan1989 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)				1,600,000	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	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, Award Vesting Period (Month)						6 months
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, Ending Balance (in shares)				231,000	231,000	231,000	231,000			0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value (in dollars per share)						$ 3.36
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)					(0)	(0)
Plan1989 [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage					20.00%
Plan1989 [Member] \| Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage					20.00%
Plan1989 [Member] \| Share-Based Payment Arrangement, Tranche Four [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage					20.00%
Plan1989 [Member] \| Share-Based Payment Arrangement, Tranche Five [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage					20.00%
Plan1989 [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage					20.00%
Plan1997 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)				400,000	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, Ending Balance (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
Plan1997 [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)					10 years
Conversion of Common Stock From Class C to Class A [Member]
Conversion of Stock, Shares Converted (in shares)					86	0
Share Repurchase Plan Renewal December2012 December2020 [Member]
Stock Repurchase Program, Authorized Amount				$ 5,000,000.0	$ 5,000,000.0		$ 5,000,000.0	$ 5,000,000.0	$ 2,750,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 4,700,000	$ 4,700,000		$ 4,700,000
Monthly Dividends Paid [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)		$ 0.0025	$ 0.0050	$ 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 A [Member]
Common Stock, Shares, Issued (in shares)				13,866,999	13,866,999	13,866,913	13,866,999
Payments of Ordinary Dividends, Common Stock					$ 1,100,000	$ 552,000
Treasury Stock, Shares, Acquired (in shares)					89,287	53,151	808,969
Payments for Repurchase of Common Stock					$ 452,000	$ 314,000	$ 2,200,000
Common Class A [Member] \| Certain Employees [Member]
Common Stock Award, Number of Shares Granted (in shares)					0	4,000
Common Stock Award, Weighted Average Fair Value (in dollars per share)						$ 2.50
Common Class A [Member] \| Non-employee Directors [Member]
Common Stock Award, Number of Shares Granted (in shares)						3,300
Common Stock Award, Weighted Average Fair Value (in dollars per share)						$ 2.68
Common Class A [Member] \| Key Advisor [Member]
Common Stock Award, Number of Shares Granted (in shares)					0
Common Class C [Member]
Common Stock, Shares, Issued (in shares)				2,068,549	2,068,549	2,068,635	2,068,549
Payments of Ordinary Dividends, Common Stock					$ 171,000	$ 88,000