Concentrations and Risks (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues earned in geographic areas
Net Sales	$ 85,120	$ 91,693
Total wholesale business [Member]
Revenues earned in geographic areas
Net Sales	28,305	32,550
Retail business [Member]
Revenues earned in geographic areas
Net Sales	56,815	59,143
Mainland China [Member]
Revenues earned in geographic areas
Net Sales	6,591	8,293
Hong Kong China [Member]
Revenues earned in geographic areas
Net Sales	5,422	6,505
Germany [Member]
Revenues earned in geographic areas
Net Sales	2,892	1,453
United Kingdom [Member]
Revenues earned in geographic areas
Net Sales	3,288	2,588
Europe-Other [Member]
Revenues earned in geographic areas
Net Sales	5,749	5,454
Japan [Member]
Revenues earned in geographic areas
Net Sales	1,445	4,813
United States [Member]
Revenues earned in geographic areas
Net Sales	$ 2,918	$ 3,444