Operations in Different Geographic Areas (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Operations in Different Geographic Areas [Line Items]
Property, equipment and leasehold improvements, net		$ 59,971	$ 59,823
Revenues	[1]	466,269	399,900	$ 417,199
United States
Operations in Different Geographic Areas [Line Items]
Property, equipment and leasehold improvements, net		59,001	58,900
Revenues	[1]	397,001	353,565	351,856
Foreign Countries
Operations in Different Geographic Areas [Line Items]
Property, equipment and leasehold improvements, net		970	923
Revenues	[1]	$ 69,268	$ 46,335	$ 65,343

[1] Geographic revenues are allocated based on the location of the client.