SHAREHOLDERS' EQUITY (Details) - USD ($)	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Outstanding at beginning	1,917	5,090
Number of shares, Employee options granted	46,363	80
Number of shares, Expiration	(7,592)	(3,253)
Number of shares, Outstanding at ending	40,688	1,917	5,090
Number of shares, Options vested	27,052
Weighted Average Exercise Price, Outstanding at beginning	$ 14.76	$ 147.40
Weighted Average Exercise Price, Employee options granted	20.06	78.10
Weighted Average Exercise Price, Expiration	25.52	25.13
Weighted Average Exercise Price, Outstanding at ending	18.79	$ 14.76	$ 147.40
Weighted Average Exercise Price, Options vested	$ 25.82
Total Intrinsic Value, Outstanding at beginning	$ 0	$ 0
Total Intrinsic Value, Employee options granted	0	0
Total Intrinsic Value, Expiration	0	0
Total Intrinsic Value, Outstanding at ending	0	$ 0	$ 0
Total Intrinsic Value, Options vested	$ 0
Weighted Average Remaining Contractual Life, Employee options granted	5 years 1 month 6 days
Weighted Average Remaining Contractual Life, Expiration
Weighted Average Remaining Contractual Life, Outstanding	5 years 10 months 17 days	3 years 4 months 2 days	3 years 10 months 17 days
Weighted Average Remaining Contractual Life, Options vested	3 years 11 months 1 day