Quarterly report pursuant to Section 13 or 15(d)

Significant Estimates and Concentrations - Additional Information (Detail)

v3.21.2
Significant Estimates and Concentrations - Additional Information (Detail) - USD ($)
Sep. 25, 2021
Dec. 26, 2020
Workers Compensation Insurance Program [Member] | Workers Compensation Insurance Claims [Member]    
Significant Estimates And Concentrations [Line Items]    
Loss contingency, stated amount $ 200,000 $ 200,000
Loss contingency, estimate of possible loss 246,000 391,000
Health Insurance Program [Member] | Insurance Claims [Member]    
Significant Estimates And Concentrations [Line Items]    
Loss contingency, stated amount 250,000 250,000
Loss contingency, estimate of possible loss $ 793,000 $ 916,000