| Property and Equipment (Schedule of Software, Net) (Details) - USD ($) | Apr. 30, 2019 | Apr. 30, 2018 | 
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Intangible asset, gross | $ 8,541,667 | $ 9,641,667 | 
| Accumulated amortization | (1,558,333) | (458,333) | 
| Intangible asset, net | 161,930 | 138,159 | 
| Software [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Intangible asset, gross | 4,314,198 | 2,878,753 | 
| Accumulated amortization | (1,351,193) | (1,146,008) | 
| Intangible asset, net | $ 2,963,005 | $ 1,732,745 | 
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Details 
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