Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ (1,823)	$ (16,029)	$ 421	$ (10,631)
Net changes to available-for-sale securities
Unrealized gains arising during the period	3,068	1,207	2,598	2,632
Reclassification for gains included in net income (loss)	(121)		(222)
Net changes to cash flow hedges
Unrealized gains (losses) arising during the period	496	44	(311)	56
Reclassification for losses included in net income (loss)	282	194	423	431
Other comprehensive income, before tax	3,725	1,445	2,488	3,119
Provision for income taxes	783	304	523	655
Other comprehensive income	2,942	1,141	1,965	2,464
Comprehensive income (loss)	$ 1,119	$ (14,888)	$ 2,386	$ (8,167)