Stock compensation expense (Details) - USD ($) |
12 Months Ended | |
---|---|---|
Apr. 30, 2022 |
Apr. 30, 2021 |
|
Share-Based Payment Arrangement [Abstract] | ||
General and administrative | $ 1,521,951 | $ 1,688,025 |
Research and development | 516,456 | 1,269,987 |
Operations | 783,781 | 220,048 |
Sales and marketing | 469,447 | 210,156 |
Total | $ 3,291,635 | $ 3,388,216 |
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