Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2020	Dec. 28, 2019
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 34,407	$ 27,117
Accumulated Amortization	8,353	5,812
Net Carrying Value	$ 26,054	21,305
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	10 years 9 months 18 days
Gross Carrying Value	$ 6,760	6,060
Accumulated Amortization	1,432	975
Net Carrying Value	$ 5,328	5,085
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	8 years 10 months 24 days
Gross Carrying Value	$ 25,050	20,450
Accumulated Amortization	6,530	4,698
Net Carrying Value	$ 18,520	15,752
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	7 years 9 months 18 days
Gross Carrying Value	$ 2,167	367
Accumulated Amortization	261	74
Net Carrying Value	$ 1,906	293
Other [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	3 years 7 months 6 days
Gross Carrying Value	$ 430	240
Accumulated Amortization	130	65
Net Carrying Value	$ 300	$ 175