Common Stock - Options Exercised (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Options exercised (in shares)
Exercise of stock options (in shares)	29,288	20,931	13,389
Proceeds from exercise of options	$ 600	$ 500	$ 200
Tax Deficit on Stock Option Exercises and Restricted Share Vesting
Tax deficits on stock options exercises and restricted share vestings	$ 376	$ (128)	$ 254