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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 |

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