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Consolidated Balance Sheets (Parenthetical) - $ / shares
Apr. 30, 2022
Apr. 30, 2021
Statement of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 300,000,000 300,000,000
Common stock, shares issued 4,194,836 2,764,282
Common stock, shares outstanding 4,194,836 2,764,282
Shares issuable 412,232 692,130