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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2012
Stockholders' Equity [Abstract]  
Summary of stock option activity

A summary of Sangamo’s stock option activity is as follows:

 

                                 
    Number of
Shares
    Weighted-
Average
Exercise per
Share Price
    Weighted Average
Remaining
Contractual Term
    Aggregate
Intrinsic
Value
 
                (In years)     (In thousands)  

Options outstanding at December 31, 2011

    8,374,190     $ 6.28       6.78          

Options granted

    1,352,150     $ 5.38                  

Options exercised

    (326,688   $ 3.73                  

Options canceled

    (215,306   $ 7.04                  
   

 

 

                         

Options outstanding at December 31, 2012

    9,184,346     $ 6.21       6.46     $ 8,821  
   

 

 

                         
Options vested and expected to vest at
December 31, 2012
    8,806,544     $ 6.25       6.31     $ 8,523  

Options exercisable at December 31, 2012

    6,435,730     $ 6.62       5.41     $ 6,679  
   

 

 

                         
Summarizes information with respect to stock options outstanding

The following table summarizes information with respect to stock options outstanding at December 31, 2012:

 

                                 
    Options Outstanding and Exercisable     Options Exercisable  

Range of Exercise Price

  Number of
Shares of
common stock
subject to options
    Weighted Average
Remaining
Contractual Life
    Number of
Shares of
common stock
subject to
options
    Weighted Average
Exercise Price
 
          (In years)              

$ 2.04  – $ 3.42

    366,394       8.31       107,603     $ 2.55  

$ 3.45  – $ 3.45

    1,613,813       5.94       1,613,813     $ 3.45  

$ 3.61  – $ 5.19

    1,045,182       3.67       912,138     $ 4.47  

$ 5.26  – $ 5.30

    7,500       8.03       1,500     $ 5.30  

$ 5.35  – $ 5.35

    1,126,273       6.93       838,523     $ 5.35  

$ 5.41  – $ 5.41

    1,186,650       9.93       —       $ —    

$ 5.42  – $ 5.66

    60,500       6.24       56,333     $ 5.46  

$ 5.70  – $ 5.70

    1,132,851       7.94       565,551     $ 5.70  

$ 5.86  – $ 6.82

    1,054,230       5.88       785,006     $ 6.49  

$ 6.88  – $14.62

    1,590,953       4.80       1,555,263     $ 12.59  
   

 

 

   

 

 

   

 

 

   

 

 

 
      9,184,346       6.46       6,435,730     $ 6.62  
   

 

 

   

 

 

   

 

 

   

 

 

 
Summary of Restricted stock unit activity

A summary of Sangamo’s restricted stock unit activity is as follows:

 

                         
    Number of
Shares
    Weighted Average
Remaining
Contractual Term
    Aggregate Intrinsic
Value
 
          (In years)     (In thousands)  

RSUs outstanding at December 31, 2011

    551,667                  

RSUs awarded

    486,750                  

RSUs released

    (1,667                

RSUs forfeited

    0                  
   

 

 

                 

RSUs outstanding at December 31, 2012

    1,036,750       1.76     $ 6,231  
   

 

 

                 

RSUs vested and expected to vest at December 31, 2012

    835,782       1.76     $ 5,023