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Going Concern (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Jun. 19, 2019
Oct. 31, 2019
Jul. 31, 2019
Oct. 31, 2018
Jul. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Apr. 30, 2019
Cash   $ 1,919,181       $ 1,919,181   $ 2,197,181
Working capital   2,100,000       2,100,000    
Accumulated deficit   (29,810,787) $ (27,583,701)     (29,810,787)   $ (26,275,102)
Net loss   $ (2,227,086) $ (1,308,599) $ (3,000,308) $ (1,481,504) (3,535,685) $ (4,481,812)  
Cash used in operating activities           $ (2,838,265) $ (3,591,655)  
Series F Preferred Stock [Member] | Securities Purchase Agreement [Member]                
Number of shares sold 1,250              
Number of shares sold, value $ 2,500,000