DISCONTINUED OPERATIONS (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Components of pretax income from discontinued operations:
Income from discontinued operations before income taxes	$ 0	$ 443	$ 0	$ 11,411
Provision for income taxes	0	92	0	4,160
Net income from discontinued operations	$ 0	351	$ 0	7,251
Discontinued Operations [Member]
Components of pretax income from discontinued operations:
Revenues		5,039		10,697
Operating expenses		(4,006)		(9,202)
General and administrative expenses		(525)		(1,146)
Gain from settlement (Note 11)				11,155
Interest expense		(65)		(93)
Income from discontinued operations before income taxes		443		11,411
Provision for income taxes		92		4,160
Net income from discontinued operations		$ 351		$ 7,251