Other Income (Expense), net (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Other Income and Expenses [Abstract]
Interest income	$ 355	$ 168	$ 701	$ 308
Interest expense	(6)	(21)	(17)	(24)
Gain (loss) on foreign exchange	58	(915)	(8)	(489)
Other expense, net	0	0	0	(1)
Total other income (expense), net	$ 407	$ (768)	$ 676	$ (206)

Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

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