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Equity Incentive Plan | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Equity Incentive Plan | Equity Incentive Plan 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 |
Expected future stock option expense related to the non-vested options outstanding as of March 31, 2019, is $1.1 million over a weighted average period of 0.99 years. 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 |
Expected future stock award expense related to the non-vested restricted share awards as of March 31, 2019, is $1.7 million over a weighted average period of 1.03 years. During the three months ended March 31, 2019 and 2018, the Company recorded $1.3 million and $1.4 million, respectively, of stock-based compensation related to the above plans.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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