Commitments and contingencies (Details) - USD ($)	Nov. 30, 2022	May 31, 2022
Assets
Right of use assets		$ 235,748
Accumulated reduction		(190,295)
Operating lease assets, net	(0)	45,453
Liabilities
Lease liability		235,748
Accumulated reduction		(188,582)
Total lease liability, net	0	47,166
Current portion		(47,166)
Non-current portion