LINE OF CREDIT (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2016 USD ($) property item	Apr. 30, 2015 USD ($)
Credit Facility [Abstract]
Amount available	$ 100,000
Line of Credit [Member] | First International Bank & Trust [Member]
Line of Credit Facility [Line Items]
Number of securing line of credit | item	1
Line of credit, minimum outstanding principal balance	$ 17,500
Debt instrument, description of variable rate basis	Prime Rate
Debt instrument, basis spread on variable rate (in hundredths)	1.25%
Debt instrument, covenant description	The facility includes covenants and restrictions requiring us to achieve on a calendar quarter basis a debt service coverage ratio on borrowing base collateral of 1.25x in the aggregate and 1.00x on individual assets in the collateral pool, and we are also required to maintain minimum depository account(s) totaling $6.0 million with First International Bank, of which $1.5 million is to be held in a non-interest bearing account.
Debt service coverage on individual assets	1.25
Debt service coverage on individual assets	1.00
Minimum deposit	$ 6,000
Non-interest bearing account	$ 1,500
Number of properties securing line of credit | property	17
Line of credit facility, collateral cost	$ 162,100
Credit Facility [Abstract]
Amount available	100,000
Amount outstanding	$ 17,500	$ 60,500
Interest rate (in hundredths)	4.75%
Maturity date	Sep. 01, 2017
Weighted average interest rate (in hundredths)	4.75%
Line of Credit [Member] | Interest Rate Floor [Member] | First International Bank & Trust [Member]
Line of Credit Facility [Line Items]
Debt instrument, interest rate (in hundredths)	4.75%
Line of Credit [Member] | Interest Rate Cap [Member] | First International Bank & Trust [Member]
Line of Credit Facility [Line Items]
Debt instrument, interest rate (in hundredths)	8.65%