Annual report pursuant to Section 13 and 15(d)

5. STOCK OPTIONS AND WARRANTS (Details Narrative)

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5. STOCK OPTIONS AND WARRANTS (Details Narrative) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended 10 Months Ended 11 Months Ended 12 Months Ended
May 30, 2018
May 24, 2017
Jun. 28, 2018
Jul. 26, 2017
Nov. 01, 2018
Feb. 27, 2018
Mar. 26, 2019
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2016
Apr. 30, 2017
Options outstanding               95,250,000      
Stock based compensation - options               $ 412,349 $ 945,078    
Stock price per share               $ 0.041      
Class A Warrants [Member]                      
Warrants expired, shares               1,056,000      
Class B Warrants [Member]                      
Warrants expired, shares               17,493,200      
Class C Warrants [Member]                      
Warrants expired, shares               18,755,200      
Class D Warrants [Member]                      
Warrants expired, shares                   18,755,200  
Options [Member]                      
Options outstanding               107,450,000 95,250,000   79,100,000
Options granted in period               12,200,000 16,150,000    
Aggregate intrinsic value               $ 0      
Options [Member] | Employees [Member]                      
Options granted in period               11,000,000 10,750,000    
Stock based compensation - options               $ 320,178 $ 741,476    
Unrecognized compensation expense               $ 226,195      
Options [Member] | Non-Employees [Member]                      
Options granted in period               1,200,000 5,400,000    
Stock based compensation - options               $ 92,171 $ 203,602    
Unrecognized compensation expense weighted-average period               8 months      
Warrants [Member] | Chardan [Member]                      
Warrants issued   833,333   2,000,000              
Aggregate fair value of warrants issued   $ 20,000   $ 39,000              
Warrants [Member] | Aeon [Member]                      
Warrants issued 1,388,889   1,923,077   2,272,727 1,666,667 1,250,000        
Aggregate fair value of warrants issued $ 19,000   $ 38,000   $ 19,000 $ 37,000 $ 9,000        
Warrants [Member] | Aeon 1 [Member]                      
Warrants issued             1,250,000        
Aggregate fair value of warrants issued             $ 9,000