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Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Restricted Stock Units (Details)

v3.22.2
Stockholders' Equity - Restricted Stock Units (Details) - USD ($)
3 Months Ended 12 Months Ended
Aug. 16, 2021
Aug. 12, 2021
Jul. 21, 2021
Feb. 04, 2020
Jan. 31, 2021
Apr. 30, 2022
Apr. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share price (in dollars per share) Ìý Ìý Ìý $ 9.49 Ìý Ìý Ìý
Total stock-based compensation expense Ìý Ìý Ìý Ìý Ìý $ 2,534,665 $ 3,958,085
RSUs Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý Ìý Ìý Ìý Ìý 520,142 275,521
Grant date fair value Ìý $ 1,000,000 Ìý Ìý Ìý Ìý Ìý
Share price (in dollars per share) Ìý $ 6.48 Ìý Ìý Ìý Ìý Ìý
Weighted average recognition period Ìý Ìý Ìý Ìý Ìý 1 year 5 months 26 days 1 year 8 months 19 days
Amortization expense Ìý Ìý Ìý Ìý Ìý $ 400,000 $ 1,200,000
Award vesting period Ìý Ìý Ìý Ìý Ìý Ìý 3 years
Unvested shares of restricted common stock outstanding (in shares) Ìý Ìý Ìý Ìý Ìý 929,928 549,972
Total unrecognized compensation expense Ìý Ìý Ìý Ìý Ìý $ 3,947,815 $ 3,600,000
Vested (in dollars per share) Ìý Ìý Ìý Ìý Ìý $ 4.27 Ìý
Total stock-based compensation expense Ìý Ìý Ìý Ìý Ìý $ 2,095,533 3,335,250
Fair value of RSUs Ìý Ìý Ìý Ìý Ìý Ìý 2,500,000
Total unrecognized compensation expense Ìý Ìý Ìý Ìý Ìý Ìý $ 3,600,000
RSUs | 2018 Equity Incentive Plan Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Weighted average recognition period Ìý Ìý Ìý Ìý Ìý 3 years Ìý
Amortization expense Ìý Ìý Ìý Ìý Ìý $ 440,450 Ìý
RSUs | Share-Based Payment Arrangement, Employee Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý Ìý Ìý Ìý Ìý 410,000 Ìý
RSUs | Share-based Payment Arrangement, Tranche Three Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Weighted average recognition period Ìý Ìý Ìý 4 years Ìý Ìý Ìý
Unvested shares of restricted common stock outstanding (in shares) Ìý Ìý Ìý 195,000 Ìý Ìý 195,000
Minimum closing price of common stock (in dollars per share) Ìý Ìý Ìý $ 12 Ìý Ìý Ìý
Consecutive trading days Ìý Ìý Ìý 20 days Ìý Ìý Ìý
Total unrecognized compensation expense Ìý Ìý Ìý Ìý Ìý Ìý $ 1,200,000
RSUs | Minimum Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Exercise price (in dollars per share) Ìý Ìý Ìý Ìý Ìý Ìý $ 5.92
RSUs | Maximum Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Exercise price (in dollars per share) Ìý Ìý Ìý Ìý Ìý Ìý $ 12.78
RSUs | Chief Financial Officer Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) 125,000 Ìý Ìý Ìý Ìý Ìý Ìý
Grant date fair value $ 725,000 Ìý Ìý Ìý Ìý Ìý Ìý
Share price (in dollars per share) $ 5.80 Ìý Ìý Ìý Ìý Ìý Ìý
RSUs | Chief Academic Officer Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý 80,000 Ìý Ìý Ìý Ìý Ìý
RSUs | Chief Operating Officer Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý 80,000 Ìý Ìý Ìý Ìý Ìý
RSUs | Chief Executive Officer Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý Ìý 125,000 Ìý Ìý Ìý Ìý
Grant date fair value Ìý Ìý $ 873,750 Ìý Ìý Ìý Ìý
Share price (in dollars per share) Ìý Ìý $ 6.99 Ìý Ìý Ìý Ìý
Amortization expense Ìý Ìý Ìý Ìý Ìý $ 242,708 Ìý
Amortization period Ìý Ìý 3 years Ìý Ìý Ìý Ìý
Options term Ìý Ìý 3 years Ìý Ìý Ìý Ìý
RSUs | Employees Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý Ìý Ìý Ìý Ìý 110,142 Ìý
Grant date fair value Ìý Ìý Ìý Ìý Ìý $ 266,988 Ìý
Award vesting period Ìý Ìý Ìý Ìý Ìý 3 years Ìý
RSUs | Employees | Minimum Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Exercise price (in dollars per share) Ìý Ìý Ìý Ìý Ìý $ 2.09 Ìý
RSUs | Employees | Maximum Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Exercise price (in dollars per share) Ìý Ìý Ìý Ìý Ìý $ 6.50 Ìý
RSUs | Board of Directors Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Granted (in shares) Ìý Ìý Ìý Ìý 15,791 Ìý Ìý
Vested (in dollars per share) Ìý Ìý Ìý Ìý $ 11.13 Ìý Ìý
Total stock-based compensation expense Ìý Ìý Ìý Ìý $ 175,754 Ìý Ìý