XML 32 R20.htm IDEA: XBRL DOCUMENT

Note 13 - Restricted Cash and Deposits	3 Months Ended
Note 13 - Restricted Cash and Deposits	Jul. 31, 2017
Notes to Financial Statements
Restricted Assets Disclosure [Text Block]	Note 13 - Restricted Cash and Deposits: Restricted Money Market Investment in the noncurrent assets on the Consolidated Condensed Balance Sheet at July 31, 2017, includes $469,000, which represents cash invested in a bank money market fund securing a letter of credit ("LOC") in the amount of $469,000 issued to the sublandlord as a security deposit for the Company's NYC leased corporate office facility.