Reconciliation of The Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($)	12 Months Ended
	Dec. 30, 2016	Jan. 01, 2016
Schedule Of Unrecognized Tax Benefits [Line Items]
Balance	$ 1,878,000	$ 1,546,000
Additions based on tax positions related to the current year	502,000	406,000
Additions for tax positions of prior years	6,000	80,000
Reductions due to lapse of statute of limitations	(430,000)	(154,000)
Reductions due to change in accounting method	0	0
Settlements	0	0
Balance	$ 1,956,000	$ 1,878,000