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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