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Property and Equipment (Schedule of Estimated Amortization Expense of Software) (Details) - USD ($)
Oct. 31, 2017
Apr. 30, 2017
Property, Plant and Equipment [Line Items]    
Intangible asset, net $ 143,254 $ 145,477
Software [Member]    
Property, Plant and Equipment [Line Items]    
2018 229,041  
2019 395,009  
2020 325,167  
2021 252,660  
2022 192,315  
Intangible asset, net $ 1,394,192 $ 1,137,327