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Disclosure of Credit Risk of Financial Instruments with Off-Balance Sheet Risk	12 Months Ended
	Apr. 30, 2015
Risks and Uncertainties [Abstract]
Disclosure of Credit Risk of Financial Instruments with Off-Balance Sheet Risk	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, no single customer accounted for a significant portion of the Company’s sales in fiscal 2015, 2014, or 2013, nor its accounts receivable as of April 30, 2015 or 2014.

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- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 16



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6327-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 21



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6442-108592



Reference 5: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 18



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592



Reference 6: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 21



-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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- References

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