Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined contribution retirement plan, employee eligibility age	18 years
Cash contributions	$ 334,000	$ 345,000
Defined bonus plan, charges to expenses	$ 2,800,000	$ 1,400,000