Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation and Employee Benefit Plans (Tables)

v2.4.0.8
Stock-Based Compensation and Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Fair Values of Stock Options
Stock Options
 
Years Ended December 31,
 
2013
 
2012
 
2011
Weighted-average grant date fair value per share
$
3.24

 
$
2.37

 
$
4.15

Risk-free interest rate
0.71
%
 
0.88
%
 
1.95
%
Dividend yield
—

 
—

 
—

Expected life (years)
4.75

 
4.84

 
5.02

Volatility
56.00
%
 
56.00
%
 
52.00
%
Fair Value of Employee Stock Purchase Rights
Employee Stock Purchase Rights
 
Years Ended December 31,
 
2013
 
2012
 
2011
Weighted-average grant date fair value per share
$ 1.85 - $2.09

 
$ 1.28 - $1.42

 
$ 1.89 - $2.46

Risk-free interest rate
0.09 - 0.10%

 
0.14 - 0.15%

 
0.05 - 0.07%

Dividend yield
—

 
—

 
—

Expected life (years)
0.50

 
0.50

 
0.50

Volatility
39.24 - 41.58%

 
46.60 - 55.74%

 
45.70 - 72.84%

Stock-Based Compensation
 
Years Ended December 31,
 
2013
 
2012
 
2011
Cost of net revenue
$
108

 
$
85

 
$
54

Research and development
8,258

 
6,382

 
4,434

Selling, general and administrative
4,620

 
3,517

 
2,880

 
$
12,986

 
$
9,984

 
$
7,368

Summary of Stock Option Activity
 
Number of Options
 
Weighted-Average Exercise Price
 
Weighted-Average Contractual Term (in Years)
 
Aggregate Intrinsic Value
Outstanding at December 31, 2012
3,194

 
$
4.81

 
 
 
 
Granted
606

 
6.93

 
 
 
 
Exercised
(63)

 
2.42

 
 
 
 
Canceled
—

 
—

 
 
 
 
Outstanding at December 31, 2013
3,737

 
$
5.19

 
5.39
 
$
19,703

Vested and expected to vest at December 31, 2013
3,713

 
$
5.19

 
5.38
 
$
19,597

Exercisable at December 31, 2013
2,075

 
$
4.62

 
4.97
 
$
12,181

Summary of Restricted Stock Units and Restricted Stock Award Activity
 
Number of Shares
 
Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2012
4,311

 
$
6.33

Granted
2,755

 
6.48

Vested
(2,163
)
 
6.35

Canceled
(419
)
 
6.36

Outstanding at December 31, 2013
4,484

 
$
6.40

Schedule of Stock by Class Reserved for Further Issuance
 
December 31, 2013
Stock options outstanding
3,737

Restricted stock units and restricted stock awards outstanding
4,484

Authorized for future grants under 2010 Equity Incentive Plan
5,091

Authorized for future issuance under 2010 Employee Stock Purchase Plan
987

Total
14,299