BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, GOODWILL AND INTANGIBLES (Details) (USD $)	3 Months Ended		12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Apr. 30, 2014
IDENTIFIED INTANGIBLE ASSETS AND INTANGIBLE LIABILITIES AND GOODWILL [Abstract]
New intangible assets	$ 265,000	$ 362,000
Addition to intangible liabilities	0	0
Weighted average lives of intangible assets and intangible liabilities	0 years 6 months	0 years 6 months
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross, Total	56,975,000		56,710,000
Finite-Lived Intangible Assets, Accumulated Amortization	(25,497,000)		(24,071,000)
Finite-Lived Intangible Assets, Net, Total	31,478,000		32,639,000
Indentified intangible liabilities, gross	173,000		173,000
Indentified intangible liabilities, accumulated amortization	(131,000)		(127,000)
Indentified intangible liabilities, net	42,000		46,000
Estimated annual amortization [Abstract]
Goodwill	1,951,000		1,100,000
Goodwill impairment	0		0
Goodwill derecognized	0	7,000	0
Goodwill added	852,000
Multi Family Residential [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold	2	3
Commercial Office [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold	3
Commercial Industrial [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold	12
Commercial Retail Property [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold	3	1
Commercial Healthcare [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold		1
Condominium Unit [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold		4
Acquired below-market leases and acquired above-market leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	(6,000)	(11,000)
Estimated annual amortization [Abstract]
2015			19,000
2016			11,000
2017			(2,000)
2018			(3,000)
2019			(2,000)
Other identified intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	1,400,000	3,600,000
Estimated annual amortization [Abstract]
2015			4,567,000
2016			4,099,000
2017			3,667,000
2018			3,543,000
2019			$ 3,457,000