Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Construction in progress	$ 2,639	$ 1,543
Land	100	100
Property plant and equipment gross	123,925	121,150
Less: accumulated depreciation and amortization	(102,794)	(96,273)
Total	21,131	24,877
Machinery, Furniture And Equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	89,545	88,914
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	30,019	28,989
Building and Improvement
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 1,622	$ 1,604