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Share-based Payments | 6 Months Ended
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Sep. 30, 2019
Share-based Payments [Abstract] |
Share-based Payments |
15. | Share-based Payments
Stock Options The Company granted options to purchase 300,039 and 245,400 shares of common stock during the six months ended September 30, 2019 and 2018, respectively. The cost associated with stock options is estimated using the Black-Scholes option-pricing model. This model requires the input of subjective assumptions including the expected volatility of the underlying stock and the expected holding period of the option. These subjective assumptions are based on both historical and other information. Changes in the values assumed and used in the model can materially affect the estimate of fair value. The following assumptions were used to derive the weighted average fair value of the stock options granted:
|  | Six Months Ended September 30, |
|  | 2019 |  |  | 2018 |
Weighted average risk free interest rate |  |  | 1.77 | % |  |  | 2.82 | %
Weighted average expected holding period (years) |  |  | 5.70 |  |  |  | 5.94 |
Weighted average expected volatility |  |  | 42.51 | % |  |  | 43.98 | %
Weighted average expected dividend yield |  |  | - |  |  |  | - |
Weighted average fair value of options granted |  | $ | 8.28 |  |  | $ | 8.71 |
The following is a summary of stock option transactions:
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding at March 31, 2019 |  |  | 1,337,165 |  |  | $ | 17.58 |
Granted |  |  | 300,039 |  |  | $ | 19.75 |
Exercised |  |  | (52,800 | ) |  | $ | 7.67 |
Forfeited |  |  | (5,171 | ) |  | $ | 20.62 |
Outstanding at September 30, 2019 |  |  | 1,579,233 |  |  | $ | 18.31 |
At September 30, 2019, options to purchase 522,677 shares of common stock were unvested at the weighted average exercise price of $20.37. At September 30, 2019, there was $4,037,000 of total unrecognized compensation expense related to unvested stock option awards. Compensation expense related to unvested stock option awards will be recognized over a weighted average vesting period of approximately 2.2 years. Restricted Stock Units and Restricted Stock (collectively “RSUs”) During the six months ended September 30, 2019 and 2018, the Company granted 79,851 and 78,400 shares of RSUs with an estimated grant date fair value of $1,591,000 and $1,490,000, respectively, which was based on the closing market price on the grant date. The following is a summary of non-vested RSUs:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at March 31, 2019 |  |  | 243,134 |  |  | $ | 21.75 |
Granted |  |  | 79,851 |  |  | $ | 19.93 |
Vested |  |  | (133,488 | ) |  | $ | 21.11 |
Forfeited |  |  | (1,101 | ) |  | $ | 21.40 |
Outstanding at September 30, 2019 |  |  | 188,396 |  |  | $ | 21.44 |
At September 30, 2019, there was $3,175,000 of unrecognized compensation expense related to these awards, which will be recognized over the remaining vesting period of approximately 2.1 years.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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