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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Involuntary Conversion of Assets(Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions |  | 12 Months Ended
--- | --- | ---
Mar. 22, 2016 | Apr. 30, 2016
GAIN ON BARGAIN PURCHASE [Abstract] |  |
Gain on bargain purchase |  | $ 3,424
187 unit - Avalon Cove - Rochester, MN [Member] |  |
GAIN ON BARGAIN PURCHASE [Abstract] |  |
Fair value at acquisition | $ 36,300 |
Cash consideration | $ 15,000 |
Units issued, acquisitions | 2.5 |
Value of units issued, acquisitions | $ 17,800 |
Share price on acquisition date | $ 7.09 |
Gain on bargain purchase | $ 3,400 |

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