Quarterly report pursuant to Section 13 or 15(d)

5. STOCK OPTIONS AND WARRANTS (Details - Warrants by exercise price)

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5. STOCK OPTIONS AND WARRANTS (Details - Warrants by exercise price)
3 Months Ended
Jul. 31, 2018
$ / shares
shares
Warrants [Member]  
Number of Warrants exercisable 37,305,070
Weighted average exercise price exercisable | $ / shares $ 0.09
$0.018, $0.025, $0.026, $0.03, $0.0575, $0.065, $0.11 and $0.12  
Number of Warrants exercisable 37,305,070
Weighted average remaining contractual term 2 years 8 months 2 days
Weighted average exercise price exercisable | $ / shares $ 0.09
Five Year Term $0.12 [Member]  
Number of Warrants exercisable 17,854,308
Weighted average remaining contractual term 2 years 4 months 17 days
Five Year Term $0.11 [Member]  
Number of Warrants exercisable 10,000,000
Weighted average remaining contractual term 1 year 7 months 24 days
Five Year Term $0.065 [Member]  
Number of Warrants exercisable 769,231
Weighted average remaining contractual term 3 years 4 months 20 days
Five Year Term $0.0575 [Member]  
Number of Warrants exercisable 869,565
Weighted average remaining contractual term 3 years 8 months 5 days
Five Year Term $0.03 [Member]  
Number of Warrants exercisable 2,500,000
Weighted average remaining contractual term 4 years 3 months 29 days
Five Year Term $0.026[Member]  
Number of Warrants exercisable 1,923,077
Weighted average remaining contractual term 4 years 10 months 28 days
Five Year Term $0.025 [Member]  
Number of Warrants exercisable 2,000,000
Weighted average remaining contractual term 3 years 11 months 26 days
Five Year Term $0.018 [Member]  
Number of Warrants exercisable 1,388,889
Weighted average remaining contractual term 4 years 9 months 29 days