CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Net loss	$ (13,694)	$ (24,027)
Other comprehensive income before tax:
Unrealized loss arising during the period	0	(499)
Change in foreign currency translation adjustments	1,734	889
Other comprehensive income before tax	1,734	390
Less: Provision for income taxes	0	2
Other comprehensive income, net of tax	1,734	388
Total comprehensive loss	$ (11,960)	$ (23,639)