CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Net income (loss)	$ (3,490)	$ 12	$ (9,795)	$ (2,881)
Other comprehensive income (loss), before tax:
Change in unrealized net gain on available-for-sale investments	13	(4)	57	25
Foreign currency translation gains (losses)	(45)	(35)	22	(35)
Other comprehensive income (loss), before tax	(32)	(39)	79	(10)
Income taxes related to items in other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	(32)	(39)	79	(10)
Comprehensive loss	$ (3,522)	$ (27)	$ (9,716)	$ (2,891)