Summary of Significant Accounting Policies (Additional Information) (Detail) (USD $)	3 Months Ended				3 Months Ended										12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Jan. 31, 2008	Mar. 31, 2012 Cash Flow From Operating Activities [Member]	Mar. 31, 2012 Cash Flow From Investing Activities [Member]	Mar. 31, 2012 Cash Flow From Financing Activities [Member]	Mar. 31, 2013 Revenue Concentration [Member] Customer A [Member]	Mar. 31, 2012 Revenue Concentration [Member] Customer A [Member]	Mar. 31, 2013 Revenue Concentration [Member] Customer B [Member]	Mar. 31, 2012 Revenue Concentration [Member] Customer B [Member]	Mar. 31, 2013 Revenue Concentration [Member] Customer C [Member]	Mar. 31, 2012 Revenue Concentration [Member] Customer C [Member]	Mar. 31, 2013 Accounts Receivable Concentration [Member] Customer A [Member]	Dec. 31, 2012 Accounts Receivable Concentration [Member] Customer A [Member]	Mar. 31, 2013 Accounts Receivable Concentration [Member] Customer B [Member]	Dec. 31, 2012 Accounts Receivable Concentration [Member] Customer B [Member]
Significant Accounting Policies [Line Items]
Concentration Risk, Percentage								24.00%	36.00%	19.00%	15.00%	12.00%	13.00%	24.00%	28.00%	15.00%	19.00%
Year end RMB: U.S. Dollar exchange rate	6.2666	6.3247	6.3011	7.3141
Investment Interest Rate Percentage	5.00%
Proceeds received from withdrawal of long-term investment	$ 159,314	$ 0
Shipping, Handling and Transportation Costs	213,054	491,278
Decrease in net cash due to reclassification					$ 2,329,614	$ 7,551,050	$ 5,221,436