Quarterly report pursuant to Section 13 or 15(d)

Summary of activity under the Plan (Details)

v3.24.1
Summary of activity under the Plan (Details) - Options 1 [Member] - USD ($)
9 Months Ended 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Apr. 30, 2021
Apr. 30, 2023
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number 6,679,100   3,694,142 4,784,809
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price $ 1.53   $ 2.17 $ 1.88
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 7 years 10 months 9 days 8 years 8 months 19 days 8 years 6 months 21 days  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value   $ 1,407,545 $ 74,586
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross 2,541,042 1,503,500    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 1.06 $ 1.40    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (3,000)    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 0.89    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares (643,751) (412,833)    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 2.43 $ 2.67    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number 3,575,496      
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price $ 1.86      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 6 years 3 months 21 days      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value