Fair Value Measurements (Tables)

6 Months Ended

Jul. 04, 2020

Fair Value Disclosures [Abstract]

Schedule of fair value of assets and liabilities measured on recurring basis

The following tables set forth the Company’s financial instruments that were measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):

	July 4, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	241,249	$	—	$	—	$	241,249
U.S. government agencies	—		24,083		—		24,083
Corporate debt securities	—		80,672		—		80,672
Total	$	241,249	$	104,755	$	—	$	346,004
Liabilities:
Contingent consideration	$	—	$	—	$	1,889	$	1,889
Total	$	—	$	—	$	1,889	$	1,889

	December 31, 2019
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	107,708	$	—	$	—	$	107,708
U.S. government agencies	—		77,364		—		77,364
Corporate debt securities	—		207,137		—		207,137
Total	$	107,708	$	284,501	$	—	$	392,209
Liabilities:
Contingent consideration	$	—	$	—	$	1,889	$	1,889
Derivative liabilities	—		748		—		748
Total	$	—	$	748	$	1,889	$	2,637