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Inventory (Tables)
9 Months Ended
Feb. 28, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory

Inventory consists of the following:

 

    February 28, 2019     May 31, 2018  
Raw materials   $ 2,006,573     $ 864,339  
Finished goods     3,144,844       2,224,928  
Total inventory   $ 5,151,417     $ 3,089,267