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Equity Incentive Plan (Tables) | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock Options Outstanding | The following table is a summary of the Company’s stock options outstanding as of March 31, 2019, and changes therein during the three months then ended.
| Number of Stock Options |  | Weighted Average Grant Date Fair Value |  | Weighted Average Exercise Price |  | Weighted Average Contractual Life (years)
Outstanding - December 31, 2018 | 3,251,595 |  |  | $ | 3.93 |  |  | $ | 13.51 |  |  | 5.62 |
Exercised | (138,123 | ) |  | 2.33 |  |  | 7.21 |  |  | — |
Outstanding - March 31, 2019 | 3,113,472 |  |  | 4.00 |  |  | 13.79 |  |  | 5.61 |
Exercisable - March 31, 2019 | 2,302,759 |  |  | 3.98 |  |  | 13.64 |  |  | 5.52 |
Status of the Company's Restricted Share Awards | The following is a summary of the status of the Company’s restricted stock awards as of March 31, 2019, and changes therein during the three months then ended.
| Number of Shares Awarded |  | Weighted Average Grant Date Fair Value
Non-vested at December 31, 2018 | 328,962 |  |  | $ | 14.31 |
Vested | (5,000 | ) |  | 16.48 |
Non-vested at March 31, 2019 | 323,962 |  |  | $ | 14.27 |

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