DISCONTINUED OPERATIONS (Details 3) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2015	Apr. 30, 2015	Apr. 30, 2014
Cash Flows from Discontinued Operating Activities:
Net income (loss)	$ 33	$ 7,284	$ 14,904	$ (2,292)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization			3,264	3,190
Impairment of assets			2,580	686
Non-cash credits and charges:
Allowance for doubtful accounts			42	416
Changes in assets and liabilities:
Accounts payable and accrued expenses			(2,155)	173
Total adjustments			13,546	6,142
Cash Flows from Investing Activities:
Capital expenditures - property, plant and equipment			(1,127)	(1,259)
Discontinued Operations [Member]
Cash Flows from Discontinued Operating Activities:
Net income (loss)			14,904	(2,292)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Non-cash gain on settlement			(11,155)	0
Non-cash gain on discontinued operations			(10,479)	0
Depreciation and amortization			311	466
Impairment of assets			0	269
Non-cash credits and charges:
Allowance for doubtful accounts			(1,484)	2,041
Changes in assets and liabilities:
Receivables			11,810	(6)
Intangible and other assets			(39)	(1,089)
Accounts payable and accrued expenses			(10,127)	(10,877)
Other assets and liabilities			(675)	(291)
Total adjustments			(21,838)	(9,487)
Net cash provided by (used in) operating activities			(6,934)	(11,779)
Cash Flows from Investing Activities:
Capital expenditures - property, plant and equipment			(25)	(152)
Proceeds from disposition of assets			0	428
Net cash provided by (used in) investing activities			$ (25)	$ 276