XML 70 R58.htm IDEA: XBRL DOCUMENT v3.6.0.2
Note 13 - Restricted Cash and Deposits (Details Textual) - USD ($)
Jan. 31, 2017
Apr. 30, 2016
Restricted Investments, Noncurrent $ 469,000
Cash Securing a Letter of Credit Issued as Security Deposit [Member]    
Security Deposit $ 469,000