EQUITY (Details) - USD ($)	3 Months Ended				6 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Units converted to common stock (in shares)	56,700		75,500		56,700	154,000
Units converted to common stock	$ 134,000		$ 279,000		$ 134,000	$ 855,000
2015 Incentive Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity awards issued (in shares)	120,792	378,000
Shares issued	$ 502,000	$ 1,400,000
2008 Incentive Award Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Equity awards issued (in shares)		59,000		220,000
Shares issued		$ 352,000		$ 1,600,000
Distribution Reinvestment and Share Purchase Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Shares issued (in shares)	0		55,000	55,000	0	821,000
Shares issued			$ 377,000			$ 5,600,000
Average price of shares issued (in dollars per share)			$ 6.87			$ 6.85
Distribution Reinvestment and Share Purchase Plan [Member] | Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Shares registered (in shares)					10,000