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Restructuring (Details) (USD $)	3 Months Ended
Restructuring (Details) (USD $)	Mar. 28, 2015	Mar. 29, 2014
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 997,000us-gaap_RestructuringReserve
Charges	58,000us-gaap_RestructuringCharges	0us-gaap_RestructuringCharges
Cash Payments	(449,000)us-gaap_PaymentsForRestructuring
Ending Balance	606,000us-gaap_RestructuringReserve	0us-gaap_RestructuringReserve
Employee severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	383,000
Charges	45,000
Cash Payments	(308,000)
Ending Balance	120,000
Facility termination costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	583,000
Charges	0
Cash Payments	(106,000)
Ending Balance	477,000
Other [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	31,000
Charges	13,000
Cash Payments	(35,000)
Ending Balance	$ 9,000

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References+ Details