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Property and Equipment (Schedule of Estimated Amortization Expense of Software) (Details) - USD ($)
Jan. 31, 2017
Apr. 30, 2016
Property, Plant and Equipment [Line Items]    
Intangible asset, net $ 156,818 $ 194,932
Software [Member]    
Property, Plant and Equipment [Line Items]    
2017 102,280  
2018 347,210  
2019 264,037  
2020 194,195  
2021 156,728  
Intangible asset, net $ 1,064,450 $ 1,006,451