Income Taxes - Net Deferred Tax (Liability) Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Deferred Tax Asset:
Foreign, state, and alternative minimum tax credit carryforwards	$ 161	$ 23
Reserves and accruals	4,842	5,003
Net operating loss carryforwards	13,694	12,306
Inventory basis difference	3,005	3,253
Research and development	75	246
Employee compensation	4,966	5,427
Allowance for doubtful accounts	488	405
Revenue recognition	636	525
Other	249	151
Deferred tax asset, gross	28,116	27,339
Less: valuation allowance	(10,863)	(11,493)
Deferred tax asset, net	17,253	15,846
Deferred Tax Liability:
Goodwill and intangible assets	(21,853)	(17,450)
Fixed asset basis difference	(4,325)	(3,234)
Reserves and accruals	0	(32)
Other	(1,199)	(284)
Deferred tax liability	(27,377)	(21,000)
Net deferred tax liability	$ (10,124)	$ (5,154)