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Stock-Based Compensation
9 Months Ended
Jan. 31, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation
Stock-Based Compensation
During the nine months ended January 31, 2020 and 2019, we granted options for 1,093,000 and 1,201,000 shares of Class A common stock, respectively. The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model. The forfeiture rates are estimated using historical data. We recorded stock option compensation cost of approximately$0.6 million and $0.5 million and income tax benefits of approximately $141,000 and $26,000 from option exercises during the three months ended January 31, 2020 and 2019, respectively. We recorded stock option compensation cost of approximately $1.5 million and $1.3 million and income tax benefits of approximately $614,000 and $260,000 from option exercises during the nine months ended January 31, 2020 and 2019, respectively. We record stock-based compensation expense on a straight-line basis over the vesting period directly to additional paid-in capital.
During the nine months ended January 31, 2020 and 2019, we issued 802,444 and 456,113 shares of Class A common stock, respectively, resulting from the exercise of stock options. The total intrinsic value of options exercised during the nine months ended January 31, 2020 and 2019 based on market value at the exercise dates was approximately $4.1 million and $2.1 million, respectively. As of January 31, 2020, unrecognized compensation cost related to unvested stock option awards approximated $6.1 million, which we expect to recognize over a weighted average period of 1.91 years.