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Equity Incentive Plan
 3 Months Ended
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.