Income Taxes - Additional Information (Detail) $ in Thousands	12 Months Ended
	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($) Store	Dec. 28, 2014 USD ($) Store	Dec. 29, 2013 USD ($)
Income Tax Disclosure [Abstract]
Likelihood of benefit being realized upon settlement	Greater than 50 percent
Number of company-owned stores sold | Store		4	14
Deferred tax asset, valuation allowance		$ 300	$ 300
Unrecognized tax benefits	$ 1,954	2,115	2,939	$ 3,573
Unrecognized tax benefits, interest on income taxes expense			100
Unrecognized tax benefits that would impact effective tax rate	1,600	1,700	1,700
Unrecognized tax benefits, interest on income taxes accrued	$ 100	100	$ 700
Reversal of interest expense		$ 600