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Note 14 - Restricted Cash and Deposits
9 Months Ended
Jan. 31, 2019
Notes to Financial Statements  
Restricted Assets Disclosure [Text Block]
Note
14
- Restricted Cash and Deposits:
 
Restricted Money Market Investment in the noncurrent assets on the Consolidated Condensed Balance Sheet at
January 31, 2019,
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 New York City leased corporate office facility.