NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Apr. 30, 2017
Noncontrolling Interest [Line Items]
Noncontrolling interests – consolidated real estate entities	$ 1,078	$ 1,924
IRET - 71 France, LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests – consolidated real estate entities	6,604	7,425
IRET-Cypress Court Apartments, LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests – consolidated real estate entities	897	986
IRET-Williston Garden Apartments, LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests – consolidated real estate entities	1,371	1,057
IRET-WRH 1, LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests – consolidated real estate entities	(8,018)	(7,904)
WRH Holding, LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests – consolidated real estate entities	$ 224	$ 360