CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Net income (loss)	$ 4,118	$ (7,441)	$ (9,166)
Other comprehensive income (loss), before tax
Change in unrealized net loss on available-for-sale investments	(23)	18	(39)
Foreign currency translation gains and losses	192	(109)	(168)
Other comprehensive income (loss), before tax	169	(91)	(207)
Income tax expense related to items in other comprehensive income (loss)	0	0	0
Net current-period other comprehensive income (loss)	169	(91)	(207)
Comprehensive income (loss)	$ 4,287	$ (7,532)	$ (9,373)