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OTHER REVENUES (Details Textual) - USD ($)
3 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Deferred Revenue Arrangement [Line Items]    
Operating Leases, Income Statement, Lease Revenue $ 57,000 $ 57,000
Deferred Revenue, Leases, Net 474,000  
Building [Member]    
Deferred Revenue Arrangement [Line Items]    
Gain (Loss) on Sale of Properties $ 1,496,000