Annual report pursuant to Section 13 and 15(d)

Compensation and Other Benefit Plans (Tables)

v3.3.1.900
Compensation and Other Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock Option Activity

The following table summarizes the Company’s stock option activity:

 

 

 

2015

 

 

2014

 

 

2013

 

 

 

Number of

shares

 

 

Weighted

Average

Exercise

Price

Per Share

 

 

Number of

shares

 

 

Weighted

Average

Exercise

Price

Per Share

 

 

Number of

shares

 

 

Weighted

Average

Exercise

Price

Per Share

 

Outstanding at beginning of year

 

 

7,702,309

 

 

$

8.15

 

 

 

7,216,041

 

 

$

8.42

 

 

 

6,788,383

 

 

$

8.99

 

Granted

 

 

1,797,222

 

 

 

3.78

 

 

 

1,891,989

 

 

 

6.69

 

 

 

1,168,203

 

 

 

3.13

 

Exercised

 

 

(163,663

)

 

 

1.89

 

 

 

(915,911

)

 

 

3.91

 

 

 

(589,355

)

 

 

2.26

 

Forfeited, expired or cancelled

 

 

(1,645,571

)

 

 

12.51

 

 

 

(489,810

)

 

 

14.36

 

 

 

(151,190

)

 

 

17.46

 

Outstanding at end of year

 

 

7,690,297

 

 

 

6.33

 

 

 

7,702,309

 

 

 

8.15

 

 

 

7,216,041

 

 

 

8.42

 

Exercisable at end of year

 

 

5,604,615

 

 

$

6.93

 

 

 

4,908,925

 

 

$

9.98

 

 

 

4,814,926

 

 

$

11.14

 

Weighted-average grant-date fair value

 

 

 

 

 

$

2.60

 

 

 

 

 

 

$

4.49

 

 

 

 

 

 

$

2.27

 

 

Unvested RSU Activity

Unvested RSU activity for the year ended December 31, 2015 is summarized below:

 

  

 

 

 

 

 

Weighted-

 

 

 

Number of

 

 

Average Grant-

 

 

 

Shares

 

 

Date Fair Value

 

Unvested balance at January 1, 2015

 

 

1,953,879

 

 

$

5.46

 

Granted

 

 

2,113,432

 

 

 

3.25

 

Vested

 

 

(1,184,147

)

 

 

4.64

 

Forfeited

 

 

(757,403

)

 

 

4.48

 

Unvested balance at December 31, 2015

 

 

2,125,761

 

 

$

4.07

 

 

Weighted Average Assumptions

The fair value of stock options granted during the years ended December 31, 2015, 2014, and 2013, was estimated based on the following weighted average assumptions for:

 

 

 

Year Ended December 31,

 

 

 

2015

 

 

2014

 

 

2013

 

Dividend yield

 

 

0

%

 

 

0

%

 

 

0

%

Expected volatility

 

 

84

%

 

 

92

%

 

 

92

%

Risk-free interest rate

 

 

1.40

%

 

 

1.72

%

 

 

0.89

%

Expected term

 

5.6 years

 

 

5.6 years

 

 

5.6 years

 

 

Stock-based Compensation expense

The following table shows total stock-based compensation expense for stock options, RSUs and ESPP in the consolidated statements of comprehensive loss (in thousands):

 

 

 

Year Ended December 31,

 

 

 

2015

 

 

2014

 

 

2013

 

Research and development

 

$

5,022

 

 

$

5,557

 

 

$

2,358

 

Selling, general and administrative

 

 

4,705

 

 

 

5,215

 

 

 

2,741

 

Total stock-based compensation expense

 

$

9,727

 

 

$

10,772

 

 

$

5,099