Quarterly report pursuant to Section 13 or 15(d)

Assumptions used to determine the fair value of the derivative warrant liability upon settlement of the derivative liability (Details)

v3.22.0.1
Assumptions used to determine the fair value of the derivative warrant liability upon settlement of the derivative liability (Details) - Derivative Warrant Liability [Member]
9 Months Ended
Jan. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum 1.39%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum 1.39%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
[custom:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTermMinimum] 3 years 8 months 1 day
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 3 years 11 months 26 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum 245.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum 249.99%