2. Principal Accounting Policies (Detail) (USD $)	0 Months Ended	5 Months Ended	7 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended			1 Months Ended		12 Months Ended					12 Months Ended
	Oct. 23, 2009	Oct. 15, 2009	Jul. 29, 2011	Aug. 27, 2010	Oct. 15, 2008	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jul. 31, 2011 Performance Based Incentive [Member]	May 31, 2009 Performance Based Incentive [Member]	Dec. 31, 2012 Performance Based Incentive [Member]	Dec. 31, 2011 Performance Based Incentive [Member]	Dec. 31, 2010 Performance Based Incentive [Member]	Dec. 31, 2012 Government Subsidy [Member]	Dec. 31, 2011 Government Subsidy [Member]	Dec. 31, 2012 Segment, Continuing Operations [Member]	Dec. 31, 2011 Segment, Continuing Operations [Member]	Dec. 31, 2010 Segment, Continuing Operations [Member]	Dec. 31, 2011 Segment, Discontinued Operations [Member]	Dec. 31, 2010 Segment, Discontinued Operations [Member]
Inventory Valuation Reserves (in Dollars)						$ 359,957	$ 392,368
Impairment of Intangible Assets, Finite-lived (in Dollars)							457,023
Goodwill, Impairment Loss (in Dollars)							555,387	1,437,005
Sales Returns, Percentage						0.80%	0.80%	0.80%
Advertising Expense (in Dollars)						17,183,533	7,159,269	21,727,818
Marketing Expense (in Dollars)						42,197,001	30,455,332	22,022,673
Shipping, Handling and Transportation Costs (in Dollars)						6,871,782	6,762,083	7,920,298
Other Selling and Marketing Expense (in Dollars)						23,551,770	20,180,305	29,346,857
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	30,000	50,000	1,332,000	84,000	80,000		1,332,000		1,332,000	2,073,190
Share-based Compensation (in Dollars)						2,364,004	1,742,646	2,599,646			2,400,000	1,700,000	2,600,000
(in Dollars)						10,435,291	9,205,157	21,709,399								10,435,291	9,205,157	21,709,399	90,452	1,752,683
(in Dollars)						10,435,291	9,205,157	21,709,399								10,435,291	9,205,157	21,709,399	90,452	1,752,683
(in Dollars)						10,435,291	9,205,157	21,709,399								10,435,291	9,205,157	21,709,399	90,452	1,752,683
Government subsidy (in Dollars)						10,435,291	9,205,157	21,709,399								10,435,291	9,205,157	21,709,399	90,452	1,752,683
Deferred Revenue, Noncurrent (in Dollars)						$ 4,320,779	$ 3,711,033							$ 4,320,779	$ 3,711,033