Segment Information - Long Lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Long-lived assets	$ 894	$ 476
United States
Segment Reporting Information [Line Items]
Long-lived assets	283	31
Hong Kong
Segment Reporting Information [Line Items]
Long-lived assets	204	51
China
Segment Reporting Information [Line Items]
Long-lived assets	252	241
Other foreign countries
Segment Reporting Information [Line Items]
Long-lived assets	$ 155	$ 153