NOTES PAYABLE (Details Textual)	9 Months Ended
	Jan. 31, 2017 ft²
Real Estate Loan [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Participation Percentage Purchased	20.00%
Real Estate Loan [Member] | Debt collateralizing property instrument [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period	8.50%
US Bank Facility [Member]
Debt Instrument [Line Items]
Area of Real Estate Property	2,200
US Bank Facility [Member] | Debt of subsidiary note payable instrument [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period	0.50%