Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Details)

v2.4.0.6
Stock Based Compensation (Details) (Stock Option Plan [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Jan. 01, 2011
Summary of the Company's stock option plan    
Stock Options, Outstanding, shares, Beginning Balance 9 24
Stock option granted, shares      
Stock option exercised, shares (9) (15)
Stock option forfeitures, shares      
Stock Options, Outstanding, shares, Ending Balance    9
Stock Options, Outstanding, Weighted Average Exercise Price, Beginning Balance $ 6.67 $ 4.26
Stock options granted, exercise price      
Stock options exercised, exercise price $ 6.67 $ 2.80
Stock options forfeitures, exercise price      
Stock Options, Outstanding, Weighted Average Exercise Price, Ending Balance    $ 6.67
Maximum [Member]
   
Summary of the Company's stock option plan    
Stock Options, Outstanding, Weighted Average Exercise Price, Beginning Balance $ 8.18 $ 8.18
Exercise price option granted      
Exercise price of option exercised $ 8.18 $ 3.66
Exercise price forfeitures      
Stock Options, Outstanding, Weighted Average Exercise Price, Ending Balance    $ 8.18
Minimum [Member]
   
Summary of the Company's stock option plan    
Stock Options, Outstanding, Weighted Average Exercise Price, Beginning Balance $ 3.66 $ 2.00
Exercise price option granted      
Exercise price of option exercised $ 2.00 $ 2.00
Exercise price forfeitures      
Stock Options, Outstanding, Weighted Average Exercise Price, Ending Balance    $ 3.66