3. COMMITMENTS AND CONTINGENCIES (Details-Schedule of leases)	12 Months Ended
	Apr. 30, 2016 ft² Number
Approximate square footage leased | ft²	152,000
Lease 1 [Member]
Approximate square footage leased | ft²	48,000
Number of buildings occupied	2
Initial lease term expiration date	Dec. 31, 2017
Number of options to extend lease	2
Extended lease term expiration date	Dec. 31, 2027
Lease 2 [Member]
Approximate square footage leased | ft²	13,000
Number of buildings occupied	1
Initial lease term expiration date	Dec. 31, 2017
Number of options to extend lease	1
Extended lease term expiration date	Dec. 31, 2022
Lease 3 [Member]
Approximate square footage leased | ft²	40,000
Number of buildings occupied	1
Initial lease term expiration date	Jul. 31, 2021
Number of options to extend lease	2
Extended lease term expiration date	Jul. 31, 2031
Lease 4 [Member]
Approximate square footage leased | ft²	26,000
Number of buildings occupied	1
Initial lease term expiration date	Aug. 31, 2023
Number of options to extend lease	2
Extended lease term expiration date	Aug. 31, 2035
Lease 5 [Member]
Approximate square footage leased | ft²	25,000
Number of buildings occupied	1
Initial lease term expiration date	Aug. 31, 2023
Number of options to extend lease	2
Extended lease term expiration date	Aug. 31, 2035