CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Net income (loss)	$ 1,100	$ (3,490)	$ 2,929	$ (9,795)
Other comprehensive income (loss), before tax:
Change in unrealized net loss on available-for-sale investments	(1)	13	3	57
Foreign currency translation gains (losses)	41	(45)	75	22
Other comprehensive income (loss), before tax	40	(32)	78	79
Income taxes related to items in other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	40	(32)	78	79
Comprehensive income (loss)	$ 1,140	$ (3,522)	$ 3,007	$ (9,716)