兼职学生

Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Stockholders' Equity (Schedule of Stock Options Activity) (Details)
6 Months Ended
Oct. 31, 2018
USD ($)
$ / shares
shares
Number of Shares 听
Exercised (26,807)
Stock Incentive Plan and Stock Option Grants to Employees and Directors [Member] 听
Number of Shares 听
Balance Outstanding, April 30, 2018 2,979,510
Granted 560,000
Exercised (72,643)
Forfeited (31,251)
Expired
Balance Outstanding, October 31, 2018 3,435,616
Exercisable, October 31, 2018 1,752,034
Weighted Average Exercise Price 听
Balance Outstanding, April 30, 2018 | $ / shares $ 3.62
Granted | $ / shares 7.55
Exercised | $ / shares 2.43
Forfeited | $ / shares
Expired | $ / shares
Balance Outstanding, October 31, 2018 | $ / shares 4.25
Exercisable, October 31, 2018 | $ / shares $ 2.62
Balance Outstanding, October 31, 2018 3 years 22 days
Exercisable, October 31, 2018 2 years 2 months 23 days
Aggregate Intrinsic Value 听
Balance Outstanding, April 30, 2018 | $ $ 16,558,373
Balance Outstanding, October 31, 2018 | $ 10,765,680
Exercisable, October 31, 2018 | $ $ 8,533,721