Summary of stock options outstanding (Details)	3 Months Ended
Summary of stock options outstanding (Details)	Jul. 31, 2022 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number
Set 1 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	1,250,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price \| $ / shares	$ 0.25
[custom:ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate1]	August 9, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	1 year 7 days

I-Minerals Inc 10-Q