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v3.20.4

Share Based Awards - Stock compensation expense (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2020
Share-based Payment Arrangement [Abstract] |  |
General and administrative | $ 94,629 | $ 189,258
Research and development | 9,945 | 19,890
Operations | 2,487 | 4,974
Total | $ 107,061 | $ 214,122

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