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3. ACCRUED EXPENSES (Details) - USD ($) | Apr. 30, 2020 | Apr. 30, 2019
--- | --- | ---
Payables and Accruals [Abstract] |  |
Payroll related costs | $ 435,577 | $ 358,616
Share issuance compensation | 0 | 240,015
Director and Officer insurance financing | 113,245 | 0
Other | 267,816 | 22,335
Total | $ 816,638 | $ 620,966

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