Business Segment Information - Summary of Property, Plant and Equipment of Reporting Segments by Geographic Area (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	$ 42,835	$ 45,139
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	31,344	34,008
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	7,732	7,658
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	861	933
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	896	382
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	191	475
Others [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	$ 1,811	$ 1,683