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Note 10 - Disclosure of Credit Risk of Financial Instruments With Off-balance Sheet Risk	12 Months Ended
	Apr. 30, 2025
Notes to Financial Statements
Concentration Risk of Financial Instruments with Off-balance Sheet Risk [Text Block]	Note 10 - Disclosure of Credit Risk of Financial Instruments with Off-Balance Sheet Risk: Other than EAM and the Value Line Funds as explained in Note 3 - Related Party Transactions, a single customer accounted for a significant portion of the Company's sales in fiscal 2025, 2024 or 2023, and its accounts receivable as of April 30, 2025 or 2024.  During the twelve months ended April 30, 2025, 2024 and 2023, 29.6%, 32.2% and 33.9%, respectively, of total publishing revenues were derived from a single customer as explained in Note 16 - Concentration.

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The entire disclosure for concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact related to financial instruments with off-balance sheet risk.

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