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Fair Value Measurements
 12 Months Ended
Dec. 31, 2011
Fair Value Measurements [Abstract]  
Fair Value Measurements

Note 4—Fair Value Measurements

        The following tables detail the fair value measurements within the fair value hierarchy of the Company's investments in marketable securities (in thousands):

 
    
   Fair Value Measurements at December 31, 2011 Using  
 
   Fair Value at
December 31,
2011 		  Quoted Prices in
Active Markets for
Identical Assets
(Level 1) 		  Significant Other
Observable
Inputs
(Level 2) 		  Significant
Unobservable
Inputs
(Level 3) 		 

Money market mutual funds

   $ 5,600   $ 5,600   $ —   $ —  

Auction and variable floating rate notes

     444     —     —     444  
                   

Total

   $ 6,044   $ 5,600   $ —   $ 444  
                   


 
    
   Fair Value Measurements at January 1, 2011 Using  
 
   Fair Value at
January 1,
2011 		  Quoted Prices in
Active Markets for
Identical Assets
(Level 1) 		  Significant Other
Observable
Inputs
(Level 2) 		  Significant
Unobservable
Inputs
(Level 3) 		 

Money market mutual funds

   $ 12,654   $ 12,654   $ —   $ —  

Corporate notes and bonds

     824     —     824     —  

Auction and variable floating rate notes

     890     —     —     890  
                   

Total

   $ 14,368   $ 12,654   $ 824   $ 890  
                   

        The following tables summarize the Company's assets measured at fair value on a recurring basis as presented in the Company's consolidated balance sheets at December 31, 2011 and January 1, 2011:

 
    
   Fair Value Measurements at December 31, 2011 Using  
 
   Fair Value at
December 31,
2011 		  Quoted Prices in
Active Markets for
Identical Assets
(Level 1) 		  Significant Other
Observable
Inputs
(Level 2) 		  Significant
Unobservable
Inputs
(Level 3) 		 

Cash equivalents

   $ 5,600   $ 5,600   $ —   $ —  

Long-term marketable securities

     444     —     —     444  
                   

Total assets measured at fair value

   $ 6,044   $ 5,600   $ —   $ 444  
                   


 
    
   Fair Value Measurements at January 1, 2011 Using  
 
   Fair Value at
January 1,
2011 		  Quoted Prices in
Active Markets for
Identical Assets
(Level 1) 		  Significant Other
Observable
Inputs
(Level 2) 		  Significant
Unobservable
Inputs
(Level 3) 		 

Cash equivalents

   $ 12,654   $ 12,654   $ —   $ —  

Short-term marketable securities

     824     —     824     —  

Long-term marketable securities

     890     —     —     890  
                   

Total assets measured at fair value

   $ 14,368   $ 12,654   $ 824   $ 890  
                   

        Fair value measurements using Level 3 inputs in the table above relate to the Company's investments in auction rate securities. The disruptions in the credit market continue to adversely affect the liquidity and overall market for auction rate securities. The Company has estimated the fair value of these investments using a discounted cash flow model which included assumptions about the credit quality and expected duration of the investments, along with discount rates affected for the general lack of liquidity. These assumptions reflect the Company's estimates about the reasonable assumptions market participants would likely use in valuing the investments, including assumptions about risk, developed based on the best information available in the circumstances.

        The following table provides a reconciliation of the beginning and ending balances for the Company's assets measured at fair value using Level 3 inputs (in thousands):

 
   Year Ended  
 
   December 31,
2011 		  January 1,
2011 		 

Beginning balance

   $ 890   $ 941  

Sales of available-for-sale marketable securities

     (441 )   —  

Realized loss included in other income (expense), net

     (59 )   —  

Unrealized loss transferred from other comprehensive loss to earnings

     59     —  

Unrealized loss included in accumulated other comprehensive loss

     (4 )   (50 )

Accrued interest

     (1 )   (1 )
           

Ending balance

   $ 444   $ 890