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v3.21.4

Other current assets (Details) - USD ($) | Oct. 31, 2021 | Apr. 30, 2021
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Prepaid inventory | $ 1,832,406 | $ 478,939
Accrued interest held in investments | 371,095 |
Prepaid insurance | 280,364 |
Prepaid expenses | 74,302 | 115,587
Security deposits | 9,372 | 9,372
Due from related party |  | 75,000
Total | $ 2,567,539 | $ 678,898

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