Concentrations and Risks (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Company's revenues as per geographic areas
Net revenue	$ 85,667,780	$ 59,129,485	$ 191,682,949	$ 137,440,975
Wholesale business [Member]
Company's revenues as per geographic areas
Net revenue	36,394,581	27,051,468	75,836,070	58,711,923
Retail business [Member]
Company's revenues as per geographic areas
Net revenue	49,273,199	32,078,017	115,846,879	78,729,052
The People's Republic of China(PRC) [Member]
Company's revenues as per geographic areas
Net revenue	12,929,219	8,616,297	27,527,244	21,647,361
Germany [Member]
Company's revenues as per geographic areas
Net revenue	5,525,792	3,305,231	11,823,952	7,676,564
United Kingdom [Member]
Company's revenues as per geographic areas
Net revenue	9,018,214	4,961,895	11,642,361	7,826,529
Europe-Other [Member]
Company's revenues as per geographic areas
Net revenue	2,061,398	3,134,666	8,517,320	7,102,281
Japan [Member]
Company's revenues as per geographic areas
Net revenue	2,431,821	5,306,554	8,674,713	9,005,388
United States [Member]
Company's revenues as per geographic areas
Net revenue	$ 4,428,137	$ 1,726,825	$ 7,650,480	$ 5,453,800