Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Tables)

v2.4.0.6
Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2012
Stockholders' Equity Note [Abstract]  
Summary of stock option activity
A summary of stock option activity is as follows: 
 
 
 
Options Outstanding
 
Shares
Available
for Grant
 
Number of
Options
 
Weighted
Average
Exercise Price
per Share
December 31, 2010
1,935,424

 
7,795,693

 
$
6.27

Authorized
1,393,142

 

 

Grants
(1,751,506
)
 
1,751,506

 
9.33

Exercises

 
(1,167,119
)
 
2.21

Early exercised options repurchased
476,458

 
(476,458
)
 
9.51

Forfeited/Cancelled
32,048

 

 

December 31, 2011
1,507,299

 
7,903,622

 
7.35

Authorized
3,712,138

 

 
 
Granted options
(1,520,950
)
 
1,520,950

 
3.42

Granted RSUs
(1,962,078
)
 

 

Exercises

 
(707,599
)
 
1.78

Forfeited/Cancelled options
2,584,332

 
(2,584,332
)
 

Forfeited/Cancelled RSUs
568,960

 

 
8

Plan Shares Expired
(1,122,311
)
 

 

December 31, 2012
3,767,390

 
6,132,641

 
$
6.65

Information about stock options outstanding and exercisable by exercise price range
The following table summarizes information about stock options outstanding and exercisable at December 31, 2012: 
 
Options Outstanding
 
Options Exercisable
Exercise Prices
Number
of
Options
 
Weighted
Average
Remaining
Contractual
Term
(Years)
 
Weighted
Average
Exercise
Price per
Share
 
Number
of
Options
 
Weighted
Average
Exercise
Price per
Share
$0.60 - $5.20
2,313,165

 
6.01
 
$
2.66

 
1,084,768

 
$
1.80

$5.20 - $8.63
1,573,714

 
3.35
 
7.22

 
1,500,998

 
7.19

$8.63 - $10.50
940,446

 
4.89
 
9.62

 
756,372

 
9.72

$10.50 - $11.87
1,305,316

 
4.86
 
10.89

 
1,080,739

 
10.91

 
6,132,641

 
4.91
 
$
6.65

 
4,422,877

 
$
7.21

Information about stock options that are vested and are expected to vest
The following table summarizes information about stock options that are vested and are expected to vest as of December 31, 2012: 
 
Number
of
Options
 
Weighted
Average
Exercise Price
per Share
 
Weighted
Average
Remaining
Contractual
Term
(Years)
 
Aggregate
Intrinsic Value
(In Thousands)
Vested
4,422,877

 
$
7.21

 
3.39
 
$
657

Expected to vest
1,478,396

 
5.37

 
8.78
 

Total vested and expected to vest
5,901,273

 
$
6.75

 
4.74
 
$
657

Assumptions used to estimate the fair value of option grants
The following assumptions were used to estimate the fair value of our employee option grants: 
 
Years Ended December 31,
 
2012
 
2011
 
2010
Weighted-average expected life (years)
6.0

 
6.1

 
6.5

Weighted-average expected volatility
61
%
 
58
%
 
73
%
Weighted-average risk free interest rate
1.0
%
 
2.2
%
 
2.6
%
Expected dividend yield
0.0
%
 
0.0
%
 
0.0
%
Schedule of stock-based compensation expense
The following table presents stock-based compensation expense included in the consolidated statements of operations (in thousands): 
 
Years Ended December 31,
 
2012
 
2011
 
2010
Research and development
$
2,334

 
$
3,311

 
$
3,352

Selling, general and administrative
2,742

 
6,120

 
5,385

 
$
5,076

 
$
9,431

 
$
8,737

Common stock reserved for issuance for the equity instruments [Table Text Block]
The following table presents common stock reserved for issuance for the following equity instruments (in thousands): 
 
December 31,
 
2012
 
2011
Warrants to purchase common stock
260

 
266

Restricted stock units
958

 
546

Stock options:
 
 
 
Outstanding
6,133

 
7,904

Reserved for future grants
3,767

 
1,507

Total common stock reserved for future issuance
11,118

 
10,223