Income Taxes Summary of tax effects of temporary differences (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Income Tax Disclosure [Abstract]
Accrued payroll and benefits	$ 5,828	$ 6,431
Capitalized inventory costs	118	139
Accrued expenses	3,448	3,145
Intangible assets	664	1,333
Net operating loss carryforwards	7,733	8,210
Deferred rent	4,653	4,844
Vendor Allowances	2,847	2,453
Other Temporary Differences	2,608	2,583
Deferred Tax Assets, Gross	27,899	29,138
Valuation Allowances and Reserves, Balance	(6,024)	(6,209)	$ (6,807)	$ (3,884)
Deferred Tax Assets, Valuation Allowance	(21,875)	(22,929)
Prepaid expenses	(1,899)	(2,007)
Fixed assets	(15,999)	(14,257)
Federal effect of state and foreign deferred items	(1,346)	(1,512)
Non-current Other	(1,032)	(1,101)
Deferred Tax Liabilities, Gross	(20,276)	(18,877)
Deferred Tax Assets, Net	$ 1,599	$ 4,052