DISCONTINUED OPERATIONS (Details 1) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Apr. 30, 2015
Components of pretax income from discontinued operations:
Income from discontinued operations before income taxes	$ 0	$ 10,968
Provision for income taxes	0	4,068
Net income from discontinued operations	0	6,900
Discontinued Operations [Member]
Components of pretax income from discontinued operations:
Revenues	0	5,658
Operating expenses	0	(5,196)
General and administrative expenses	0	(621)
Gain from settlement (Note 11)	0	11,155	$ 11,155
Interest expense	0	(28)
Income from discontinued operations before income taxes	0	10,968
Provision for income taxes	0	4,068
Net income from discontinued operations	$ 0	$ 6,900