ÎÞÓǶÌÊÓƵ

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Stock Option Activity (Details)

v3.21.2
Stockholders' Equity - Summary of Stock Option Activity (Details)
6 Months Ended
Oct. 31, 2021
USD ($)
$ / shares
shares
Apr. 30, 2021
USD ($)
$ / shares
shares
Oct. 31, 2021
USD ($)
$ / shares
shares
Number of Shares Ìý Ìý Ìý
Balance Outstanding, October 31, 2021 (in shares) 992,050 Ìý 992,050
Exercisable, October 31, 2021 (in shares) 928,457 Ìý 928,457
Stock Incentive Plan and Stock Option Grants to Employees and Directors Ìý Ìý Ìý
Number of Shares Ìý Ìý Ìý
Balance Outstanding, April 30, 2021 (in shares) Ìý Ìý 1,214,473
Granted (in shares) Ìý Ìý 0
Exercised (in shares) Ìý Ìý (216,752)
Forfeited (in shares) Ìý Ìý (4,419)
Expired (in shares) Ìý Ìý (1,252)
Balance Outstanding, October 31, 2021 (in shares) 992,050 1,214,473 992,050
Exercisable, October 31, 2021 (in shares) 928,457 Ìý 928,457
Weighted Average Exercise Price Ìý Ìý Ìý
Balance Outstanding, April 30, 2021 (in dollars per share) | $ / shares Ìý Ìý $ 6.24
Granted (in dollars per share) | $ / shares Ìý Ìý 0
Exercised (in dollars per share) | $ / shares Ìý Ìý 5.77
Forfeited (in dollars per share) | $ / shares Ìý Ìý 4.61
Expired (in dollars per share) | $ / shares Ìý Ìý 2.76
Balance Outstanding, October 31, 2021 (in dollars per share) | $ / shares $ 6.61 $ 6.24 6.61
Exercisable, October 31, 2021 (in dollars per share) | $ / shares $ 6.72 Ìý $ 6.72
Stock Option Activity, Additional Disclosures Ìý Ìý Ìý
Options outstanding, weighted average remaining contractual term 1 year 6 months 21 days 1 year 10 months 17 days Ìý
Options exercisable, weighted average remaining contractual term 1 year 6 months 3 days Ìý Ìý
Options outstanding, aggregate intrinsic value | $ $ 172,313 $ 204,719 $ 172,313
Options exercisable, aggregate intrinsic value | $ $ 161,584 Ìý $ 161,584