Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
5. STOCK OPTIONS AND WARRANTS (Details - Options by exercise price) - $ / shares
6 Months Ended
Oct. 31, 2018
Apr. 30, 2018
Options [Member]    
Number of Options 96,450,000 95,250,000
Weighted Average Remaining Contractual LIfe (years) 1 year 3 months 11 days  
Weighted Average Stock Price $ 0.12  
Numer of Options Exercisable 93,950,000  
Weighted Average Exercise Price $ 0.12  
$0.190 [Member]    
Number of Options 25,000,000  
Weighted Average Remaining Contractual LIfe (years) 5 months 16 days  
Weighted Average Stock Price $ 0.19  
Numer of Options Exercisable 25,000,000  
Weighted Average Exercise Price $ 0.19  
$0.110 [Member]    
Number of Options 27,200,000  
Weighted Average Remaining Contractual LIfe (years) 7 months 10 days  
Weighted Average Stock Price $ 0.11  
Numer of Options Exercisable 27,200,000  
Weighted Average Exercise Price $ 0.11  
$0.184 [Member]    
Number of Options 250,000  
Weighted Average Remaining Contractual LIfe (years) 8 months 23 days  
Weighted Average Stock Price $ 0.184  
Numer of Options Exercisable 250,000  
Weighted Average Exercise Price $ 0.184  
$0.063 [Member]    
Number of Options 15,600,000  
Weighted Average Remaining Contractual LIfe (years) 1 year 3 months 19 days  
Weighted Average Stock Price $ 0.063  
Numer of Options Exercisable 15,600,000  
Weighted Average Exercise Price $ 0.063  
$0.104 [Member]    
Number of Options 10,450,000  
Weighted Average Remaining Contractual LIfe (years) 2 years 1 month 27 days  
Weighted Average Stock Price $ 0.104  
Numer of Options Exercisable 10,450,000  
Weighted Average Exercise Price $ 0.104  
$0.0685 [Member]    
Number of Options 600,000  
Weighted Average Remaining Contractual LIfe (years) 2 years 6 months  
Weighted Average Stock Price $ 0.0685  
Numer of Options Exercisable 600,000  
Weighted Average Exercise Price $ 0.0685  
$0.058 [Member]    
Number of Options 2,450,000  
Weighted Average Remaining Contractual LIfe (years) 2 years 8 months 26 days  
Weighted Average Stock Price $ 0.058  
Numer of Options Exercisable 2,450,000  
Weighted Average Exercise Price $ 0.058  
$0.0734 [Member]    
Number of Options 1,200,000  
Weighted Average Remaining Contractual LIfe (years) 3 years 6 months  
Weighted Average Stock Price $ 0.0734  
Numer of Options Exercisable 1,200,000  
Weighted Average Exercise Price $ 0.0734  
$0.0729 [Member]    
Number of Options 1,800,000  
Weighted Average Remaining Contractual LIfe (years) 3 years 8 months 9 days  
Weighted Average Stock Price $ 0.0729  
Numer of Options Exercisable 1,600,000  
Weighted Average Exercise Price $ 0.0729  
$0.089 [Member]    
Number of Options 1,200,000  
Weighted Average Remaining Contractual LIfe (years) 1 year 10 months 10 days  
Weighted Average Stock Price $ 0.089  
Numer of Options Exercisable 1,200,000  
Weighted Average Exercise Price $ 0.089  
$0.0553 [Member]    
Number of Options 500,000  
Weighted Average Remaining Contractual LIfe (years) 1 year 11 months 19 days  
Weighted Average Stock Price $ 0.0553  
Numer of Options Exercisable 500,000  
Weighted Average Exercise Price $ 0.0553  
$0.0534 [Member]    
Number of Options 1,200,000  
Weighted Average Remaining Contractual LIfe (years) 4 years 10 months 6 days  
Weighted Average Stock Price $ 0.0534  
Numer of Options Exercisable 400,000  
Weighted Average Exercise Price $ 0.0534  
$0.0558 [Member]    
Number of Options 9,000,000  
Weighted Average Remaining Contractual LIfe (years) 2 years 6 months  
Weighted Average Stock Price $ 0.0558  
Numer of Options Exercisable 7,500,000  
Weighted Average Exercise Price $ 0.0558