| Concentrations (Details) | Apr. 30, 2018  USD ($) | 
|---|---|
| Risks and Uncertainties [Abstract] | |
| Amount of cash balance uninsured by FDIC | $ 14,422,499 | 
| X | ||||||||||
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- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available. 
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| X | ||||||||||
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- References No definition available. 
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