Business Segments, Geographic Data, and Sales by Major Customers - Information by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 15,259				$ 20,902				$ 15,259	$ 20,902
Net sales	152,511	$ 280,130	$ 95,182	$ 70,826	132,326	$ 236,699	$ 105,781	$ 93,004	598,649	567,810	$ 613,111
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	11,461				15,825				11,461	15,825
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	3,556				4,920				3,556	4,920
Net sales									481,309	439,979	479,133
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 242				$ 157				242	157
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									65,557	69,646	71,094
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									19,937	21,923	21,882
Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									11,415	17,827	21,157
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									10,112	8,504	6,514
Australia and New Zealand
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									7,870	5,937	6,503
Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 2,449	$ 3,994	$ 6,828