Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (54,099)	$ (159,233)	$ 48,580
Other comprehensive (loss) income:
Unrealized loss related to marketable securities, net of tax	(172)	(69)	(373)
Reclassification adjustment for losses related to marketable securities included in other income (expense)	79	442	170
Realized gain on sale of auction rate securities, previously unrealized, net of tax	0	0	(1,147)
Translation adjustment loss, net of tax	(1,303)	(1,243)	(330)
Change in actuarial valuation of defined benefit pension	150	(156)	(59)
Comprehensive (loss) income	$ (55,345)	$ (160,259)	$ 46,841