Quarterly report pursuant to Section 13 or 15(d)

5. STOCK OPTIONS AND WARRANTS (Details Narrative)

v3.19.1
5. STOCK OPTIONS AND WARRANTS (Details Narrative) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2019
Jan. 31, 2018
Apr. 30, 2018
Stock based compensation - options     $ 282,673 $ 766,382  
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     $ 0.042    
Non-Employee Options [Member]          
Options granted in period     1,200,000 5,400,000  
Stock based compensation - options 21,000 $ 57,000 $ 78,000 $ 154,000  
Unrecognized compensation expense 24,000   $ 24,000    
Unrecognized compensation expense weighted-average period     5 months    
Employee Options [Member]          
Options granted in period     0 10,750,000  
Stock based compensation - options 51,000 $ 220,000 $ 205,000 $ 612,000  
Unrecognized compensation expense $ 0   $ 0    
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       $ 39,000  
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    
Warrants [Member] | Placement Agent [Member] | November 1, 2018 [Member]          
Warrants issued, shares     2,272,727    
Aggregate fair value of warrants issued     $ 19,000