CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Net income (loss)	$ 1,829	$ (6,305)
Other comprehensive income, before tax:
Change in unrealized net gain (loss) on available-for-sale investments	4	44
Foreign currency translation gains	34	67
Other comprehensive income, before tax	38	111
Income tax provision related to items in other comprehensive income	0	0
Other comprehensive income, net of tax	38	111
Comprehensive income (loss)	$ 1,867	$ (6,194)