EQUITY - Equity Awards (Details) - USD ($)	3 Months Ended				6 Months Ended
	Oct. 31, 2017	Jul. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Oct. 31, 2017
Equity
Units converted to common stock (in shares)	39,622		0		999,529
Aggregate cost of stock conversion	$ 246,524				$ 6,000,000
Average price of shares issued (in dollars per share)	$ 6.22				$ 5.98
2015 Incentive Plan [Member]
Equity
Equity awards issued (in shares)	0	75,000	120,792	378,000
Total grant-date value shares issued		$ 445,000	$ 502,000	$ 1,400,000