SHAREHOLDERS' EQUITY (Details) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 02, 2015	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Number of shares, Outstanding at beginning		40,688	1,917
Number of shares, Employee options granted	801,250	4,054,250	46,363
Number of shares, Forfeited/expired		(804,665)	(7,592)
Number of shares, Outstanding at ending		3,290,273	40,688	1,917
Number of shares, Options vested and exercisable		2,475,386
Weighted Average Exercise Price, Outstanding at beginning		$ 18.79	$ 14.76
Weighted Average Exercise Price, Employee options granted		1.32	20.06
Weighted Average Exercise Price, Forfeited/expired		1.37	25.52
Weighted Average Exercise Price, Outstanding at ending		1.52	$ 18.79	$ 14.76
Weighted Average Exercise Price, Options vested and exercisable		$ 1.58
Total Intrinsic Value, Outstanding at beginning		$ 0	$ 0
Total Intrinsic Value, Employee options granted		$ 0	$ 0
Total Intrinsic Value, Forfeited/expired		$ 0	$ 0
Total Intrinsic Value, Outstanding at ending		$ 0	$ 0	$ 0
Total Intrinsic Value, Options vested and exercisable		$ 0
Weighted Average Remaining Contractual Life (in years) Options granted		7 years 7 months 6 days	5 years 1 month 6 days
Weighted Average Remaining Contractual Life (in years) Forfeited/expired		0 years	0 years
Weighted Average Remaining Contractual Life (in years) Outstanding		9 years 4 months 24 days	5 years 10 months 24 days	3 years 3 months 18 days
Weighted Average Remaining Contractual Life (in years) Options vested and exercisable		9 years 4 months 24 days