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v3.22.2.2

Stock compensation expense (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2022 | Oct. 31, 2021
Share-Based Payment Arrangement [Abstract] |  |  |  |
Operations | $ 225,879 | $ 311,346 | $ 384,310 | $ 374,607
Research and development | 209,497 | 84,751 | 354,295 | 141,231
Sales and marketing | 162,269 | 114,088 | 269,343 | 158,832
General and administrative | 649,151 | 389,752 | 994,319 | 609,353
Total | $ 1,246,796 | $ 899,937 | $ 2,002,267 | $ 1,284,023

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