Quarterly report pursuant to Section 13 or 15(d)

Summary of activity under the Plan (Details)

v3.22.2.2
Summary of activity under the Plan (Details) - Options 1 [Member] - USD ($)
6 Months Ended 12 Months Ended
Oct. 31, 2022
Apr. 30, 2022
Apr. 30, 2021
May 01, 2021
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number 3,994,558 3,694,142   2,197,475
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price $ 2.18 $ 2.17 $ 1.79  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 8 years 2 months 19 days 8 years 6 months 21 days 8 years 8 months 4 days  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 608,162 $ 1,407,545 $ 4,943,870  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 397,000 1,681,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2.38 $ 2.58    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (150,000)    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price   $ 2.49    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares (96,584) (34,333)    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 2.48 $ 2.11    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number 2,569,306      
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price $ 2.06      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 7 years 5 months 23 days      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 559,578