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Shareholders' Equity (Details Narrative) - USD ($)
 1 Months Ended 6 Months Ended 12 Months Ended
May 31, 2019
Apr. 30, 2019
Feb. 28, 2019
Apr. 30, 2018
Apr. 30, 2017
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Feb. 28, 2017
May 31, 2016
Apr. 30, 2016
May 31, 2015
Apr. 30, 2015
Convertible promissory notes               $ 181,500          
Warrants issued                 25,000        
Warrant exercise price                 $ 0.01        
Number of warrants exercised     16,666                    
Number of warrants exercised, value     $ 166                    
Number of options, granted 505,000 505,000   560,400 253,846 505,000 560,400 263,846          
Exercise price of options granted           $ 0.43 $ 0.50 $ 0.64          
Option term 10 years 10 years       6 years 11 months 23 days 6 years 11 months 15 days 3 years 4 months 17 days          
Minimum [Member]                          
Exercise price of options granted $ 0.41 $ 0.41                      
Option vested period 4 years 4 years                      
Maximum [Member]                          
Exercise price of options granted $ 0.44 $ 0.44                      
Option vested period 5 years 5 years                      
Warrant [Member]                          
Warrants issued     16,666                    
Warrant exercise price     $ 0.01                    
Convertible Promissory Note [Member]                          
Convertible promissory notes     $ 181,500   $ 165,000         $ 200,000 $ 200,000 $ 200,000 $ 200,000
Conversion price per share     $ 0.50   $ 0.85             $ 1.50 $ 1.50
Principal and accrued interest     $ 211,983                    
Debt instrument conversion shares     423,966                    
Warrant exercise price         $ 0.65         $ 1.50 $ 1.50 $ 1.50 $ 1.50