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Goodwill And Other Intangible Assets (Estimated Aggregate Amortization Expense) (Details) - USD ($)
Oct. 31, 2017
Apr. 30, 2017
Goodwill And Other Intangible Assets [Abstract]    
For the remaining 9 months of the fiscal year ending April 30, 2018 $ 214,968  
For the fiscal year ending April 30, 2019 423,721  
For the fiscal year ending April 30, 2020 411,406  
For the fiscal year ending April 30, 2021 403,199  
For the fiscal year ending April 30, 2022 395,578  
Thereafter 2,144,288  
Total $ 3,993,160 $ 4,213,235