Business Segment Information - Summary of Property, Plant and Equipment of Reporting Segments by Geographic Area (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	$ 48,916	$ 52,306
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	38,398	42,534
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	7,013	6,015
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	617	998
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	769	1,036
Others [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	$ 2,119	$ 1,723