Share Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 25, 2011	Jun. 30, 2012	Jun. 25, 2011
Share Based Compensation (Additional Textual) [Abstract]
Options granted to purchase			1,000
Exercise price of the options granted			$ 1.89
Average grant date fair value of options granted			$ 0.96
Share-based compensation expense	$ 0.7	$ 0.6	$ 1.6	$ 1.2
Minimum [Member]
Share Based Compensation (Textual) [Abstract]
Exercise period (in years) of options granted			1 year
Maximum [Member]
Share Based Compensation (Textual) [Abstract]
Exercise period (in years) of options granted			3 years