Leases - Other Information Relating to Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows relating to operating leases	$ (2,276)	$ (1,546)	$ (6,497)	$ (4,506)
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 3,079		$ 17,917
Weighted average remaining lease term in years
Operating leases	6 years 9 months 21 days	4 years 1 month 17 days	6 years 9 months 21 days	4 years 1 month 17 days
Weighted average discount rate
Operating leases	5.80%	6.20%	5.80%	6.20%