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Note 13 - Restricted Cash and Deposits | 6 Months Ended
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Oct. 31, 2016
Notes to Financial Statements |
Restricted Assets Disclosure [Text Block] | Note 13 - Restricted Cash and Deposits: The Restricted Money Market Investment included in noncurrent assets on the Consolidated Condensed Balance Sheet, amounting to $469,000 at October 31, 2016, represents invested cash securing a letter of credit ("LOC") in the amount of $469,000 issued by a financial institution on behalf of Value Line, Inc. to the sublandlord as a security deposit for the Company's new leased corporate office facility.

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