CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Net income (loss)	$ 11,657	$ (7,758)	$ (11,494)	$ (24,365)
Other comprehensive income (loss) before tax:
Loss reclassified into earnings	0	0	56	0
Change in foreign currency translation adjustments	(3,431)	447	(3,874)	(2,577)
Other comprehensive income (loss) before tax	(3,431)	447	(3,818)	(2,577)
Less: Provision for (benefit from) income taxes	284	(78)	335	291
Other comprehensive income (loss), net of tax	(3,715)	525	(4,153)	(2,868)
Total comprehensive income (loss)	$ 7,942	$ (7,233)	$ (15,647)	$ (27,233)