Unaudited Quarterly Financial Data - Summary of Consolidated Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Oct. 03, 2020	Jul. 04, 2020	Apr. 04, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 221,601	$ 238,033	$ 202,783	$ 220,204	$ 174,826	$ 197,823	$ 198,570	$ 173,737	$ 882,621	$ 744,956	$ 698,493
Gross profit	78,798	86,936	74,463	81,127	56,163	69,995	72,940	61,270	321,324	260,368	243,468
Net income	$ 9,987	$ 17,322	$ 2,199	$ 15,600	$ 3,280	$ 15,106	$ 17,045	$ 8,257	$ 45,108	$ 43,688	$ 53,933
Net income per share – basic	$ 0.17	$ 0.29	$ 0.04	$ 0.27	$ 0.06	$ 0.26	$ 0.29	$ 0.14	$ 0.77	$ 0.75	$ 1.03
Net income per share – diluted	$ 0.17	$ 0.29	$ 0.04	$ 0.26	$ 0.06	$ 0.26	$ 0.29	$ 0.14	$ 0.76	$ 0.74	$ 1.00