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Summary of shares of common stock issued (Details) - Common Stock [Member] - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2024 | Oct. 31, 2023 | Jan. 31, 2024 | Jan. 31, 2023 | Apr. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Shares, Outstanding, Beginning Balance | 55,649,896 | 55,541,875 | 54,568,065 | 53,748,735 | 53,748,735
Vesting of restricted stock to employees, net of shares withheld of 27,189 to pay taxes |  |  | 145,623 |  | 653,308
Vesting of restricted stock to Board of Directors |  |  | 181,088 |  | 116,507
Vesting of restricted stock to consultants |  |  | 1,761 |  | 9,683
Shares issued for services |  |  |  |  | 39,832
Shares, Outstanding, Ending Balance | 74,171,106 | 55,649,896 | 74,171,106 | 54,385,461 | 54,568,065
Conversion of preferred stock |  |  | $ 818,334 |  |
Issuance of common stock through ATM facilities |  | 53,235 | 53,235 |  |
Issuance of common stock through public offering | 18,400,000 |  | 18,400,000 |  |
Exercise of stock options | 3,000 |  | 3,000 |  |

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