2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICY (Tables)

9 Months Ended

Jan. 31, 2018

ESPP [Member]

Schedule of antidilutive shares

	Three Months Ended January 31,				Nine Months Ended January 31,
	2018		2017		2018		2017
Stock Options		115,425		–		78,427		–
ESPP		1,202		5,198		466		27,661
Total		116,627		5,198		78,893		27,661

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

Schedule of antidilutive shares

	Three Months Ended January 31,				Nine Months Ended January 31,
	2018		2017		2018		2017
Stock Options		3,214,694		4,231,073		3,663,102		4,156,497
Warrants		39,040		39,040		39,040		39,040
Series E Preferred Stock		1,978,783		1,978,784		1,978,783		1,948,109
Total		5,232,517		6,248,897		5,680,925		6,143,646