Operations in Different Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 02, 2015	Oct. 03, 2014	Jul. 04, 2014	Apr. 04, 2014	Jan. 03, 2014	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Jan. 02, 2015		Jan. 03, 2014		Dec. 28, 2012
OperationsIn Different Geographic Areas [Line Items]
Property, Equipment and Leasehold Improvements, net	$ 28,264				$ 28,721				$ 28,264		$ 28,721
Revenues	73,611	78,557	76,574	75,962	72,772	75,231	75,505	72,660	304,704	[1]	296,168	[1]	292,653	[1]
United States
OperationsIn Different Geographic Areas [Line Items]
Property, Equipment and Leasehold Improvements, net	27,761				28,076				27,761		28,076
Revenues									273,635	[1]	263,341	[1]	260,760	[1]
Foreign Countries
OperationsIn Different Geographic Areas [Line Items]
Property, Equipment and Leasehold Improvements, net	503				645				503		645
Revenues									$ 31,069	[1]	$ 32,827		$ 31,893	[1]

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