EQUITY - Equity Awards (Details) - USD ($)	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Equity
Units converted to common stock (in shares)	960,000
Units converted to common stock	$ 5,700,000
Average price of shares issued (in dollars per share)	$ 5.97
2015 Incentive Plan [Member]
Equity
Equity awards issued (in shares)	75,000	378,000
Shares issued	$ 445,000	$ 1,400,000
Distribution Reinvestment and Share Purchase Plan [Member]
Equity
Shares issued (in shares)	0	0
Distribution Reinvestment and Share Purchase Plan [Member] | Maximum [Member]
Equity
Shares registered (in shares)	10,000