Note 6. Net Income (loss) Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
   
Three Months Ended
 
   
March 31, 2013
   
March 25, 2012
 
   
(in thousands except for per-share amounts)
 
Numerator:
           
Net loss
  $ (14,435 )   $ (13,119 )
Denominator:
               
Denominator for basic net income per share, weighted average shares
    58,086       59,676  
Denominator for diluted net income per share, weighted average shares
    58,086       59,676  
Net loss per share:
               
Basic net loss per share
  $ (0.25 )   $ (0.22 )
Diluted net income (loss) per share
  $ (0.25 )   $ (0.22 )
Potentially dilutive shares excluded from the diluted income per share computation because their effect would have been anti-dilutive
    4,615       2,276