Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2016	Dec. 25, 2015	Dec. 26, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 10,051	$ (10,732)	$ 11,357
Other comprehensive income (loss):
Change in cumulative translation adjustment	(393)	(5)
Cash flow hedges:
Change in fair value of derivatives	(60)	23
Adjustment for net gain (loss) realized and included in net income	88	(36)
Total change in unrealized gain (loss) on derivative instruments	28	(13)
Other comprehensive loss	(365)	(18)
Comprehensive income (loss)	$ 9,686	$ (10,750)	$ 11,357