BENEFIT PLANS: (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2015	Apr. 30, 2015	Apr. 30, 2014
Income (loss) from continuing operations	$ 201	$ (532)	$ (3,584)	$ (647)
Income (loss) from discontinued operations	33	7,284	14,904	(2,292)
Net income (loss)	$ 234	$ 6,752	$ 11,320	$ (2,939)
Earnings (loss) per share -continuing operations - basic and diluted	$ 0.03	$ (0.07)	$ (0.45)	$ (0.09)
Earnings (loss) per share - discontinued operations - basic and diluted	0.00	0.92	1.88	(0.33)
Earnings (loss) per share - basic and diluted	$ 0.03	$ 0.85	$ 1.43	$ (0.42)
Revised [Member]
Income (loss) from continuing operations	$ (230)	$ (963)
Income (loss) from discontinued operations	(79)	7,172
Net income (loss)	$ (309)	$ 6,209
Earnings (loss) per share -continuing operations - basic and diluted	$ (0.03)	$ (0.12)
Earnings (loss) per share - discontinued operations - basic and diluted	(0.01)	0.91
Earnings (loss) per share - basic and diluted	$ (0.04)	$ 0.78