CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Net loss	$ (7,758)	$ (15,583)	$ (24,365)	$ (71,110)
Other comprehensive income (loss) before tax:
Unrealized gain (loss) arising during the period	0	8	0	(605)
Change in foreign currency translation adjustments	447	2,265	(2,577)	7,147
Other comprehensive income (loss) before tax	447	2,273	(2,577)	6,542
Less: Provision for (benefit from) income taxes	(78)	0	291	2
Other comprehensive income (loss), net of tax	525	2,273	(2,868)	6,540
Total comprehensive loss	$ (7,233)	$ (13,310)	$ (27,233)	$ (64,570)