Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Property, Plant and Equipment [Line Items]
Property plant and equipment	$ 56,331	$ 57,559
Less accumulated depreciation and amortization	45,094	45,638
Total property, plant and equipment, net	11,237	11,921
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment	14,653	15,242
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment	$ 41,678	$ 42,317