DISCONTINUED OPERATIONS (Details 2) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2015	Apr. 30, 2015	Apr. 30, 2014
Components of pretax income (loss) from discontinued operations:
Income (loss) from discontinued operations before income taxes			$ 11,408	$ (2,627)
Provision (benefit) for income taxes			7,233	(335)
Net income (loss) from discontinued operations	$ 33	$ 7,284	14,904	(2,292)
Discontinued Operations [Member]
Components of pretax income (loss) from discontinued operations:
Revenues			17,700	25,405
Operating expenses			(15,810)	(25,526)
General and administrative expenses			(1,605)	(2,164)
Impairment of assets			0	(269)
Interest expense			(32)	(73)
Gain from settlement (Note 17)			11,155	0
Gain on discontinued operations			10,729	0
Income (loss) from discontinued operations before income taxes			22,137	(2,627)
Provision (benefit) for income taxes			7,233	(335)
Net income (loss) from discontinued operations			$ 14,904	$ (2,292)