Quarterly report pursuant to Section 13 or 15(d)

7. STOCK OPTIONS AND WARRANTS (Details Narrative)

v3.8.0.1
7. STOCK OPTIONS AND WARRANTS (Details Narrative) - USD ($)
 3 Months Ended 9 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2018
Jan. 31, 2017
Apr. 30, 2017
Stock based compensation - options     $ 766,382 $ 456,002  
Options [Member]          
Options outstanding 95,250,000   95,250,000   79,100,000
Options granted in period     16,150,000 0  
Aggregate intrinsic value $ 188,360   $ 188,360    
Non-Employee Options [Member]          
Options granted in period     4,200,000 13,100,000  
Stock based compensation - options 57,000 $ 6,000 $ 154,000 $ 18,000  
Non-Employee Options [Member] | Guaranteed Options [Member]          
Options granted in period       600,000  
Non-Employee Options [Member] | Non-Guaranteed Options [Member]          
Options granted in period       12,500,000  
Option expiration date       Apr. 30, 2017  
Options expired       12,500,000  
Employee Options [Member]          
Stock based compensation - options 220,000 $ 110,000 612,000 $ 438,000  
Unrecognized compensation expense $ 362,000   $ 362,000    
Unrecognized compensation expense weighted-average period     11 months    
Warrants [Member] | Placement Agent [Member] | May 24, 2017 [Member]          
Warrants issued, shares     833,333    
Fair value of warrants issued     $ 20,000    
Warrants [Member] | Placement Agent [Member] | July 26, 2017 [Member]          
Warrants issued, shares     2,000,000    
Fair value of warrants issued     $ 23,000