Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation (Tables)

v3.10.0.1
Equity-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Options We apply the following assumptions in our Black-Scholes-Merton Model option-pricing formula:
 
Year Ended
December 31,
2018
 
Year Ended
December 31,
2017
 
Year Ended
December 31,
2016
Expected term (in years)
3.0 - 10.0
 
3.0 - 10.0
 
1.0 - 10.0
Risk-free interest rate
2.32% - 3.09%
 
1.32% - 2.41%
 
0.71% - 2.51%
Expected volatility
40% - 54%
 
38% - 55%
 
38% - 64%
Expected dividend yield
0%
 
0%
 
0%
Summary of Option Activity Under Stock Plans A summary of option activity under our stock option plans as of December 31, 2018, and the changes during the year is presented below: 
Options
Number of
options
 
Weighted
average
exercise
price
 
Weighted
average
remaining
contractual
term (years)
 
Aggregate
intrinsic value
(in thousands)
Outstanding at December 31, 2017
31,299,385

 
$
10.08

 
6.37
 
$
1,886

Granted
5,880,900

 
$
4.30

 
 
 
 
Exercised
(540,000
)
 
$
3.69

 
 
 
 
Forfeited
(1,533,025
)
 
$
8.14

 
 
 
 
Expired
(2,075,962
)
 
$
8.48

 
 
 
 
Outstanding at December 31, 2018
33,031,298

 
$
9.31

 
5.93
 
$
232

Vested and expected to vest at December 31, 2018
31,317,632

 
$
9.39

 
5.80
 
$
206

Exercisable at December 31, 2018
21,451,856

 
$
10.18

 
4.64
 
$
58