BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, Goodwill (Details)	6 Months Ended		12 Months Ended
	Oct. 31, 2016 USD ($) property	Oct. 31, 2015 USD ($) property	Apr. 30, 2016 USD ($)
Goodwill [Line Items]
Goodwill	$ 1,645,000		$ 1,680,000
Goodwill, Impairment Loss	0		0
Assets Held for Sale [Member]
Goodwill [Line Items]
Goodwill	$ 35,000		$ 17,000
Commercial Properties [Member]
Goodwill [Line Items]
Number of real estate properties sold | property		7
Goodwill derecognized		$ 193,000
Commercial Properties [Member] | Assets Held for Sale [Member]
Goodwill [Line Items]
Number of properties | property	1
Goodwill derecognized	$ 17,000