Information by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 24,527		$ 24,527		$ 22,841
Net Sales	119,565	$ 140,977	214,070	$ 236,786
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	17,813		17,813		15,710
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	6,272		6,272		6,587
Net Sales	99,070	115,216	168,630	186,184
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	442		442		$ 544
Net Sales	168	338	387	677
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	10,337	11,410	22,897	24,165
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	2,580	5,053	7,024	9,703
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 7,410	$ 8,960	$ 15,132	$ 16,057