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Note 6 - Treasury Stock and Net Income Per Common Share (Details Textual) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Receipt of Donated Treasury Stock, Shares	3,720
Value of Donated Treasury Shares	$ 1
Common Stock, Shares, Outstanding		1,377,026		1,377,026
Weighted Average Number of Shares Outstanding, Basic (in shares)		1,377,026	1,377,026	1,377,026	1,377,026

X

- Definition

The number of shares of receipt of donated treasury stock.

+ References

No definition available.

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X

- Definition

The value of donated treasury shares.

+ References

No definition available.

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X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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-Name Accounting Standards Codification
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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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