Stock compensation expense (Details) - USD ($) |
3 Months Ended | 6 Months Ended |
---|---|---|
Oct. 31, 2021 |
Oct. 31, 2021 |
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Share-based Payment Arrangement [Abstract] | ||
General and administrative | $ 389,749 | $ 609,350 |
Research and development | 84,752 | 141,232 |
Operations | 311,347 | 374,608 |
Sales and marketing | 114,089 | 158,833 |
Total | $ 899,937 | $ 1,284,023 |
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