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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 29, 2012
Summary of Company's Equity Award Activity - Options

Equity award activity as of September 29, 2012 and changes during the nine months ended September 29, 2012 were as follows (in thousands, except per share data):

 

     Number of
Options		     Average
Exercise
Price
Per Share		      Aggregate
Intrinsic
Value		  

Outstanding at December 31, 2011

      9,873      $ 7.03       $ 7,924   

Options granted

      127      $ 7.18      

Options exercised

      (428 )    $ 5.26       $     1,025   

Options canceled

      (224 )    $ 8.64      
  

 

 

       

Outstanding at September 29, 2012

      9,348      $ 7.07       $ 5,763   
  

 

 

       

Vested and expected to vest at September 29, 2012

      9,298         $ 5,763   

Exercisable at September 29, 2012

      7,177      $ 6.74       $ 5,763   
Summary of Company's Equity Award Activity - RSUs
     Number of
Restricted
Stock Units		     Weighted-
Average
Grant Date
Fair Value
Per Share		      Aggregate
Intrinsic
Value		  

Outstanding at December 31, 2011

      5,957      $ 8.77       $ 37,407   

RSUs granted

      3,463      $ 7.60      

RSUs released

      (2,304 )    $ 9.08       $     16,763   

RSUs canceled

      (298 )    $ 8.36      
  

 

 

       

Outstanding at September 29, 2012

      6,818      $ 8.10       $ 37,363   
  

 

 

       

Expected to release at September 29, 2012

      6,616         $ 36,257   
Summary of Company's Equity Award Activity - PSUs
     Number of
Performance
Stock Units		     Weighted-
Average
Grant Date
Fair Value
Per Share		      Aggregate
Intrinsic
Value		  

Outstanding at December 31, 2011

      2,595      $ 10.51       $ 16,304   

PSUs granted

      515      $ 7.85      

PSUs released

      (884 )    $ 9.40       $     5,448   

PSUs canceled

      (821 )    $ 9.97      
  

 

 

       

Outstanding at September 29, 2012

      1,405      $ 10.56       $ 7,701   
  

 

 

       

Expected to vest at September 29, 2012

      1,396         $ 7,649   
Total Stock Based Compensation Cost for Instruments Granted but Not Yet Amortized

The following table presents total stock-based compensation cost for instruments granted but not yet amortized, net of estimated forfeitures, of the Company’s equity compensation plans as of September 29, 2012. These costs are expected to be amortized on a straight-line basis over the following weighted-average periods (in thousands, except for weighted-average period):

 

     Unrecognized
Compensation
Expense, Net		      Weighted-
Average Period
(in years)		  

Stock options

    $ 5,546         1.3   

RSUs

    $ 37,310         2.0   

PSUs

    $ 2,103         0.9   
Ranges of Estimated Values of Stock Options and Performance Based Stock Options Granted

The ranges of estimated values of stock options and performance-based stock options granted, as well as ranges of assumptions used in calculating these values were based on estimates as follows:

 

     Three Months Ended    Nine Months Ended
       September 29,  
2012		      September 24,  
2011		      September 29,  
2012		      September 24,  
2011

Volatility

    N/A    60%    65% - 68%    58% - 62%

Risk-free interest rate

    N/A    1.80%    0.7% - 1.0%    1.70% - 2.60%

Expected life

    N/A    5.3 years    4.0 - 5.3 years    4.6 - 5.5 years

Estimated fair value

    N/A    $3.85    $3.75 - $3.76    $3.47 - $4.63

Stock-based compensation expense (in thousands)

    $2,553    $3,085    $7,121    $9,585

 

N/A - not applicable because the Company did not grant any options to employees during the three months ended September 29,  2012.
Estimated Fair Value of ESPP Shares

The fair value of the ESPP shares was estimated at the date of grant using the following assumptions:

 

     Three Months Ended    Nine Months Ended
       September 29,  
2012		      September 24,  
2011		      September 29,  
2012		      September 24,  
2011

Volatility

    54%    51%    54% - 57%    51% - 66%

Risk-free interest rate

    0.17%    0.12%    0.16% - 0.17%    0.12% - 0.20%

Expected life

    0.5 years    0.5 years    0.5 years    0.5 years

Estimated fair value

    $1.73    $2.09    $1.73 - $2.63    $2.09 - $2.70

Stock-based compensation expense (in thousands)

    $895    $715    $2,653    $2,648
Summary of the Effects of Stock Based Compensation on Company's Balance Sheets and Statements of Operations

The following tables summarize the effects of stock-based compensation on the Company’s condensed consolidated balance sheets and statements of operations for the periods presented (in thousands):

 

                     September 29,  
2012		        December 31,  
2011		  

Stock-based compensation effects in inventory

          $ 4,333       $ 3,479   

Stock-based compensation effects in deferred inventory cost

          $ 74       $ 179   

Stock-based compensation effects in fixed assets

          $ 5       $ 36   
     Three Months Ended      Nine Months Ended  
       September 29,  
2012		        September 24,  
2011		        September 29,  
2012		        September 24,  
2011		  

Stock-based compensation effects in net loss before income taxes

            

Cost of revenue

    $ 683       $ 722       $ 1,975       $ 2,213   

Research and development

      3,439         3,745         10,454         11,075   

Sales and marketing

      2,685         2,216         7,648         6,501   

General and administration

      2,804         4,410         7,732         14,021   
  

 

 

     

 

 

     

 

 

     

 

 

  
     9,611         11,093         27,809         33,810   

Cost of revenue - amortization from balance sheet (1)

      1,706         1,487         3,875         3,617   
  

 

 

     

 

 

     

 

 

     

 

 

  

Total stock-based compensation expense

    $ 11,317       $ 12,580       $ 31,684       $ 37,427   
  

 

 

     

 

 

     

 

 

     

 

 

  

 

(1)

Stock-based compensation expense deferred to inventory and deferred inventory costs in prior periods and recognized in the current period.