2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICY (Tables)

6 Months Ended

Oct. 31, 2016

ESPP [Member]

Schedule of antidilutive shares

	Three Months Ended October 31,				Six Months Ended October 31,
	2016		2015		2016		2015
Stock Options		–		1,958,583		–		2,340,300
ESPP		165,672		40,581		119,972		40,519
Total		165,672		1,999,164		119,972		2,380,819

Stock Options, Warrants, and Series E Preferred Stock (assuming the if-converted method) [Member]

Schedule of antidilutive shares

	Three Months Ended October 31,				Six Months Ended October 31,
	2016		2015		2016		2015
Stock Options		29,806,420		19,235,713		28,834,459		15,775,106
Warrants		273,280		273,280		273,280		273,280
Series E Preferred Stock		13,798,438		13,248,858		13,529,397		13,243,359
Total		43,878,138		32,757,851		42,637,136		29,291,745