Annual report pursuant to Section 13 and 15(d)

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

v3.23.2
Assumptions used to determine fair value of derivative warrant liability upon settlement of derivative liability (Details)
12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
[custom:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm2] 8 years 3 months  
Derivatives Assumptions Used [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum 2.83% 0.52%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum 4.51% 2.87%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term 2 years 5 months 1 day 3 years 5 months 1 day
[custom:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm2] 3 years 6 months 4 years 6 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum 138.49% 211.02%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum 235.23% 292.28%