兼职学生

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Schedule of Stock Options Activity) (Details)

v3.19.2
Stockholders' Equity (Schedule of Stock Options Activity) (Details)
 3 Months Ended
Jul. 31, 2019
USD ($)
$ / shares
shares
Number of Shares 听
Balance Outstanding, July 31, 2019 3,237,840
Exercisable, July 31, 2019 2,057,324
Stock Incentive Plan and Stock Option Grants to Employees and Directors [Member] 听
Number of Shares 听
Balance Outstanding, April 30, 2019 3,408,154
Granted 30,000
Exercised (191,147)
Forfeited (9,167)
Expired
Balance Outstanding, July 31, 2019 3,237,840
Exercisable, July 31, 2019 2,057,324
Weighted Average Exercise Price 听
Balance Outstanding, April 30, 2019 | $ / shares $ 4.44
Granted | $ / shares 4.12
Exercised | $ / shares 1.88
Forfeited | $ / shares 7.62
Expired | $ / shares
Balance Outstanding, July 31, 2019 | $ / shares 4.57
Exercisable, July 31, 2019 | $ / shares $ 3.50
Weighted Average Remaining Contractual Term 听
Balance Outstanding, April 30, 2019 2 years 10 months 25 days
Balance Outstanding, July 31, 2019 2 years 10 months 25 days
Exercisable, July 31, 2019 2 years 9 months 14 days
Aggregate Intrinsic Value 听
Balance Outstanding, April 30, 2019 | $ $ 6,880,644
Granted | $
Forfeited | $
Balance Outstanding, July 31, 2019 | $ 6,880,644
Exercisable, July 31, 2019 | $ $ 5,130,588