Reconciliation of The Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($)	12 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Schedule Of Unrecognized Tax Benefits [Abstract]
Balance	$ 1,748,000	$ 1,789,000
Additions based on tax positions related to the current year	515,000	599,000
Reductions due to lapse of statute of limitations	(340,000)	(257,000)
Reductions for tax positions of prior years		(383,000)
Balance	$ 1,923,000	$ 1,748,000