Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 34,407	$ 27,117
Accumulated Amortization	9,200	5,812
Net Carrying Value	$ 25,207	21,305
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	8 years 8 months 12 days
Gross Carrying Value	$ 25,050	20,450
Accumulated Amortization	7,141	4,698
Net Carrying Value	$ 17,909	15,752
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	10 years 7 months 6 days
Gross Carrying Value	$ 6,760	6,060
Accumulated Amortization	1,585	975
Net Carrying Value	$ 5,175	5,085
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	7 years 7 months 6 days
Gross Carrying Value	$ 2,167	367
Accumulated Amortization	323	74
Net Carrying Value	$ 1,844	293
Other [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	3 years 4 months 24 days
Gross Carrying Value	$ 430	240
Accumulated Amortization	151	65
Net Carrying Value	$ 279	$ 175