Quarterly report pursuant to Section 13 or 15(d)

Stock compensation expense (Details)

v3.21.4
Stock compensation expense (Details) - USD ($)
 3 Months Ended 6 Months Ended
Oct. 31, 2021
Oct. 31, 2021
Share-based Payment Arrangement [Abstract]    
General and administrative $ 389,749 $ 609,350
Research and development 84,752 141,232
Operations 311,347 374,608
Sales and marketing 114,089 158,833
Total $ 899,937 $ 1,284,023