Concentrations and Risks (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Company's revenues as per geographic areas
Net revenue	$ 279,633,212	$ 215,779,014
Wholesale business [Member]
Company's revenues as per geographic areas
Net revenue	171,041,099	162,236,470
Retail business [Member]
Company's revenues as per geographic areas
Net revenue	108,592,113	53,542,544
The People's Republic of China [Member]
Company's revenues as per geographic areas
Net revenue	70,161,563	61,908,224
Germany [Member]
Company's revenues as per geographic areas
Net revenue	21,627,788	31,232,561
United Kingdom [Member]
Company's revenues as per geographic areas
Net revenue	22,885,131	14,042,858
Europe-Other [Member]
Company's revenues as per geographic areas
Net revenue	15,154,483	13,119,058
Japan [Member]
Company's revenues as per geographic areas
Net revenue	23,082,506	20,245,785
United States [Member]
Company's revenues as per geographic areas
Net revenue	$ 18,129,628	$ 21,687,984