Note 10 - Disclosure of Credit Risk of Financial Instruments with Off-balance Sheet Risk

12 Months Ended

Apr. 30, 2018

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,

no

single customer accounted for a significant portion of the Company's sales in fiscal

2018,

2017

or

2016,

nor its accounts receivable as of

April 30, 2018

or

2017.