Revenue - Schedule of Revenue as Percentage of Total Revenue (Detail) - Customer Concentration Risk - Total revenue	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	100.00%	100.00%
Medicaid MCO
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	55.50%	52.90%
Medicaid
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	22.20%	22.00%
Commercial
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	9.90%	9.30%
Medicare
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	12.30%	15.60%
Self-pay
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	0.10%	0.20%