Concentrations (Details) - USD ($) |
Apr. 30, 2019 |
Apr. 30, 2018 |
|---|---|---|
| Risks and Uncertainties [Abstract] | Ìý | Ìý |
| Amount of cash balance uninsured by FDIC | $ 9,359,208 | $ 14,422,499 |
| X | ||||||||||
- 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 | ||||||||||
- References No definition available.
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