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v3.22.2.2

Stock compensation expense (Details) - USD ($) | 3 Months Ended
--- | ---
Jul. 31, 2022 | Jul. 31, 2021
Share-Based Payment Arrangement [Abstract] |  |
General and administrative | $ 345,168 | $ 219,601
Research and development | 144,798 | 56,480
Operations | 158,431 | 63,261
Sales and marketing | 107,074 | 44,744
Total | $ 755,471 | $ 384,086

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