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Stock-Based Compensation (Tables)
3 Months Ended
May 08, 2013
Stock Option
 
Schedule of Estimated Fair Value of Stock Options Assumptions

The fair value of stock options was estimated using the Black-Scholes option-pricing model with the following assumptions:

 

     For the Three Months
Ended
 
     March 31,
2013
    April 1,
2012
 

Expected life (years)

     4.0        3.5   

Interest rate

     0.6     0.4

Volatility-historical

     46.8     56.0

Dividend yield

     0.0     0.0
Stock Purchase Rights
 
Schedule of Estimated Fair Value of Stock Options Assumptions

The fair value of the employees’ purchase rights granted in the three months ended April 1, 2012 was estimated using the Black-Scholes option-pricing model with the following assumptions:

 

     For the Three Months Ended
April 1,
2012
 

Expected life (years)

     0.5   

Interest rate

     0.06

Volatility-historical

     52.6

Dividend yield

     0.0