For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	May 01, 2018	Apr. 30, 2018
Disaggregation of Revenue [Line Items]
Accumulated distributions in excess of net income	$ (402,190)			$ (395,669)
Rental revenue	43,514
Other property revenue	2,432
Revenues	$ 45,946	$ 40,978
Accounting Standards Update 2014-09 [Member] \| Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Disaggregation of Revenue [Line Items]
Accumulated distributions in excess of net income			$ 627
Product Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue	100.00%
Product Concentration Risk [Member] \| Rental Revenue [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue	94.70%
Product Concentration Risk [Member] \| Other Property Revenue [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue	5.30%