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Note 5 - Employees' Profit Sharing and Savings Plan (Details Textual) - USD ($)	6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023
Deferred Compensation Arrangement with Individual, Contributions by Employer	$ 191,000	$ 191,000

X

- Definition

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration