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Stock-Based Compensation (Tables)
3 Months Ended
May 04, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Disclosure of share-based compensation arrangements by share-based payment award
Total stock-based compensation recognized primarily in selling, general and administrative expenses from stock options and RSUs consisted of the following: 
 
Three Months Ended
 
May 4,
2013
 
April 28,
2012
 
(in thousands)
Stock options
$
213

 
$
230

RSUs
419

 
118

 
$
632

 
$
348

Schedule of share-based payment award, stock options, valuation assumptions
The fair value of stock option awards was estimated at the grant date using the Black-Scholes option valuation model with the following weighted average assumptions: 
 
Three Months Ended
 
May 4,
2013
 
April 28,
2012
Risk-free interest rate
0.8
%
 
0.7
%
Expected volatility
91.4
%
 
89.6
%
Expected life
5.0 years

 
5.0 years

Expected dividends
$
—

 
$
—

Weighted average fair value per share
$
2.46

 
$
3.20