Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 24, 2016	Jun. 26, 2015	Jun. 24, 2016	Jun. 26, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 723	$ 2,207	$ (2,516)	$ 3,380
Other comprehensive income (loss):
Change in cumulative translation adjustment	(21)		76
Cash flow hedges:
Change in fair value of derivatives	(64)		(128)
Adjustment for net loss realized and included in net income	24		50
Total change in unrealized loss on derivative instruments	(40)		(78)
Other comprehensive loss	(61)		(2)
Comprehensive income (loss)	$ 662	$ 2,207	$ (2,518)	$ 3,380

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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Amount after tax and 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, attributable to parent entity.

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