Commitments And Contingencies Commitments (Details) (USD $)	0 Months Ended	1 Months Ended					3 Months Ended	9 Months Ended
	May 10, 2012	Apr. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Aug. 31, 2008	Jul. 31, 2007	Sep. 29, 2012	Sep. 29, 2012
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months							$ 618,000	$ 618,000
Unrecorded Unconditional Purchase Obligation, Due within Two Years							2,487,000	2,487,000
Operating Leases, Future Minimum Payments, Due in Three Years							2,481,000	2,481,000
Operating Leases, Future Minimum Payments, Due in Four Years							2,339,000	2,339,000
Operating Leases, Future Minimum Payments, Due in Five Years							740,000	740,000
Operating Leases, Future Minimum Payments, Due Thereafter							883,000	883,000
Operating Leases, Future Minimum Payments Due							9,548,000	9,548,000
Leases [Abstract]
Length of operating lease agreement (in years)			3 years				3 years
Length of captial lease agreement (in years)						5 years
Length of sale leaseback agreement (in years)	27 months				4 years
Sale leaseback transaction, sales price				5,400,000	6,800,000
Sale leaseback assets repurchased		1,200,000		1,300,000			0	0
Sale leaseback transaction, minimum future lease payments	$ 2,000,000						$ 2,300,000	$ 2,300,000