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Summary of shares of common stock issued (Details) - Common Stock [Member] - shares | 12 Months Ended
--- | ---
Apr. 30, 2024 | Apr. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Shares, Outstanding, Beginning Balance | 54,568,065 | 53,748,735
Vesting of restricted stock to employees, net of shares withheld of 27,189 to pay taxes | 192,742 | 653,308
Vesting of restricted stock to Board of Directors | 252,214 | 116,507
Vesting of restricted stock to consultants | 1,761 | 9,683
Shares issued for services |  | 39,832
Shares, Outstanding, Ending Balance | 74,289,351 | 54,568,065
Conversion of preferred stock | 818,334 |
Issuance of common stock through ATM facilities | 53,235 |
Issuance of common stock through public offering | 18,400,000 |
Exercise of stock options | 3,000 |

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