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

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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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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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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The cash outflow to reacquire common stock during the period.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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 weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock 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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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

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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 8 - Stockholders' Equity (Details Textual) - USD ($)	3 Months Ended					6 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Sep. 19, 2024	Feb. 25, 2022	Feb. 24, 2022
Stock Repurchase Program, Authorized Amount		$ 5,000,000				$ 5,000,000
Payments for Repurchase of Common Stock						1,121,000	$ 1,171,000
Excise Tax Liability Accrued on Stock Repurchases		$ 5,000		$ 6,000		$ 10,000	$ 12,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)		100,100		0		100,100	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)		$ 1.08
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)		1,000		0		1,000	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)		0		0			0
Share-Based Payment Arrangement, Expense		$ 11,000		$ 0			$ 0
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 97,000		$ 0		$ 97,000	$ 0
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						5 months 23 days
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month)		6 months				6 months
Plan 1989 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)		100,100				100,100
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in dollars per share)		$ 2.44				$ 2.44
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)		228,000		229,000		228,000	229,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)		$ 6.05				$ 6.05
Plan 1997 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)		2,000		2,000		2,000	2,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)		$ 2.74		$ 2.74		$ 2.74	$ 2.74
Treasury Stock, Common [Member]
Treasury Stock, Shares, Acquired (in shares)		236,731	197,887	196,295	198,213
Treasury Stock, Common [Member] \| Common Class A [Member]
Treasury Stock, Shares, Acquired (in shares)		236,731		196,295		434,618	394,508
Payments for Repurchase of Common Stock		$ 587,000		$ 560,000		$ 1,100,000	$ 1,200,000
Share Repurchase Plan Renewal December2012 December2020 [Member]
Stock Repurchase Program, Authorized Amount		$ 5,000,000				$ 5,000,000		$ 6,500,000	$ 5,000,000	$ 2,750,000
O,2024,M1-12, Dividends [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)		$ 0.0075
O,2025, M 1-3, Dividends [Member] \| Forecast [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.0075