Segment Information - Net Sales by Market (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 264,860	$ 124,590
United States
Segment Reporting Information [Line Items]
Net sales	3,246	1,438
Canada
Segment Reporting Information [Line Items]
Net sales	2,746	1,374
Hong Kong
Segment Reporting Information [Line Items]
Net sales	245,737	111,028
China
Segment Reporting Information [Line Items]
Net sales	4,425	1,538
Taiwan
Segment Reporting Information [Line Items]
Net sales	5,965	4,628
South Korea
Segment Reporting Information [Line Items]
Net sales	1,129	1,009
Commonwealth of Independent States (Russia, Kazakhstan and Ukraine)
Segment Reporting Information [Line Items]
Net sales	1,139	3,113
Other foreign countries
Segment Reporting Information [Line Items]
Net sales	$ 473	$ 462