NOTES PAYABLE: (Details Textual) - ft²	1 Months Ended	12 Months Ended
	Feb. 28, 2017	Apr. 30, 2016
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%