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Note 5 - Other Current Assets (Tables) | 6 Months Ended
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Oct. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Other current assets | Other current assets included:
|  | October 2021 |  | April 2021
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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