Quarterly report pursuant to Section 13 or 15(d)

Summary of activity under the 2019 Equity Incentive Plan

v3.21.2
Summary of activity under the 2019 Equity Incentive Plan - Options 1 [Member] - USD ($)
3 Months Ended 12 Months Ended
Jul. 31, 2021
Apr. 30, 2021
Apr. 30, 2020
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 2,646,475 2,197,475 1,597,475
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price $ 1.92 $ 1.79 $ 1.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 449,000 600,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2.57 $ 3.63  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 8 years 4 months 17 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 3,648,567    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 1,305,810    
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price $ 2.21    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 8 years 9 months    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 1,626,037