Risks and Uncertainties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues earned in geographic areas
Revenues	$ 50,086	$ 77,316	$ 108,441	$ 165,272
Wholesale Business [Member]
Revenues earned in geographic areas
Revenues	22,049	37,251	44,337	65,353
Retail Business [Member]
Revenues earned in geographic areas
Revenues	28,037	40,065	64,104	99,919
The People's Republic of China [Member]
Revenues earned in geographic areas
Revenues	3,111	6,491	7,764	17,246
Hong Kong China [Member]
Revenues earned in geographic areas
Revenues	2,054	6,463	5,045	7,717
Germany [Member]
Revenues earned in geographic areas
Revenues	48	877	243	1,726
United Kingdom [Member]
Revenues earned in geographic areas
Revenues	471	2,038	1,309	2,838
Europe-Other [Member]
Revenues earned in geographic areas
Revenues	3,612	4,224	7,511	9,453
Japan [Member]
Revenues earned in geographic areas
Revenues	2,205	1,311	6,589	6,248
United States [Member]
Revenues earned in geographic areas
Revenues	$ 10,548	$ 15,847	$ 15,876	$ 20,125