Quarterly report pursuant to Section 13 or 15(d)

5. STOCK OPTIONS AND WARRANTS (Details Narrative)

v3.10.0.1
5. STOCK OPTIONS AND WARRANTS (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Apr. 30, 2018
Stock based compensation - options     $ 210,189 $ 489,796  
Options [Member]          
Options outstanding 96,450,000   96,450,000   95,250,000
Options granted in period     1,200,000    
Aggregate intrinsic value $ 0   $ 0    
Aggregate intrinsic value per share     $ 0.052    
Non-Employee Options [Member]          
Options granted in period     1,200,000 4,200,000  
Stock based compensation - options 20,000 $ 57,000 $ 57,000 $ 98,000  
Unrecognized compensation expense 45,000   $ 45,000    
Unrecognized compensation expense weighted-average period     8 months    
Employee Options [Member]          
Options granted in period     0 2,950,000  
Stock based compensation - options 77,000 $ 188,000 $ 153,000 $ 392,000  
Unrecognized compensation expense $ 51,000   $ 51,000    
Unrecognized compensation expense weighted-average period     2 months    
Warrants [Member] | Placement Agent [Member] | May 24, 2017 [Member]          
Warrants issued, shares       833,333  
Aggregate fair value of warrants issued       $ 20,000  
Warrants [Member] | Placement Agent [Member] | July 26, 2017 [Member]          
Warrants issued, shares       2,000,000  
Aggregate fair value of warrants issued       $ 23,000  
Warrants [Member] | Placement Agent [Member] | May 30, 2018 [Member]          
Warrants issued, shares     1,388,889    
Aggregate fair value of warrants issued     $ 19,000    
Warrants [Member] | Placement Agent [Member] | June 28, 2018 [Member]          
Warrants issued, shares     1,923,077    
Aggregate fair value of warrants issued     $ 38,000