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Operations in Different Geographic Areas (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2022
Dec. 31, 2021
Jan. 01, 2021
Operations in Different Geographic Areas [Line Items]      
Property, equipment and leasehold improvements, net $ 65,539 $ 59,971  
Revenues [1] 513,293 466,269 $ 399,900
United States      
Operations in Different Geographic Areas [Line Items]      
Property, equipment and leasehold improvements, net 64,742 59,001  
Revenues [1] 450,445 397,001 353,565
Foreign Countries      
Operations in Different Geographic Areas [Line Items]      
Property, equipment and leasehold improvements, net 797 970  
Revenues [1] $ 62,848 $ 69,268 $ 46,335
[1] Geographic revenues are allocated based on the location of the client.