Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
Apr. 04, 2015	Mar. 29, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (3,528)us-gaap_NetIncomeLoss	$ (4,011)us-gaap_NetIncomeLoss
Components of other comprehensive income/(loss), net of tax:
Foreign currency translation adjustments	(2,183)	(974)
Amortization of defined benefit pension items:
Net actuarial loss	240	110
Prior service cost	2	2
Defined benefit pension plan adjustments	242	112
Other comprehensive loss, net of tax	(1,941)	(862)
Comprehensive loss	$ (5,469)us-gaap_ComprehensiveIncomeNetOfTax	$ (4,873)us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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