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Related Party Transactions (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2020 | Oct. 31, 2019
Related Party Transaction [Line Items] |  |  |  |
Due to related parties | $ 4,000 |  | $ 4,000 |
Board Member One | Board Member |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, amounts of transaction | 15,000 | $ 18,000 | 33,000 | $ 36,000
Board Member Two | Board Member |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction, amounts of transaction | $ 3,900 | $ 14,000 | $ 9,500 | $ 29,000

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