MORTGAGES PAYABLE AND LINE OF CREDIT, Line of Credit (Details) - Line of Credit [Member] $ in Millions	6 Months Ended
	Oct. 31, 2016 USD ($) property	Apr. 30, 2016 USD ($)
LINE OF CREDIT [Abstract]
Amount available	$ 100.0
Number of properties securing line of credit | property	17
Interest rate (in hundredths)	4.75%
Line of credit, minimum outstanding principal balance	$ 17.5
Amount outstanding	$ 47.5	$ 17.5
Debt Service Coverage On Aggregate Assets	1.25
Debt Service Coverage On Individual Assets	1.00
Minimum depository accounts	$ 6.0
Non-interest bearing account	$ 1.5