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Summary of warrants issued and fair values (Details) - USD ($)
 1 Months Ended
Apr. 30, 2021
Oct. 31, 2020
Apr. 30, 2024
Note 18 Warrants      
[custom:NumberOfWarrantsUponIssuance] 675,000 399,998  
[custom:InitialFairValueOfWarrantsUponIssuance] $ 2,870,666 $ 267,999  
[custom:NumberOfWarrantsOutstanding-0]     266,666
[custom:FairValueOfWarrantsOutstanding-0]     $ 209,938
[custom:NumberOfWarrantsOutstanding2-0]     540,000
[custom:FairValueOfWarrantsOutstanding2-0]     $ 443,242