Net Land Use Right and Purchased Patent (Detail) (USD $)	1 Months Ended			3 Months Ended		3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Feb. 28, 2011	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2012 Land use rights	Mar. 31, 2012 Land use rights	Dec. 31, 2012 Patent 1	Mar. 31, 2012 Patent 1	Oct. 31, 2011 Patents (non-US No. ZL200510045001.9)	Dec. 31, 2012 Patents (non-US No. ZL200510045001.9)	Mar. 31, 2012 Patents (non-US No. ZL200510045001.9)	Oct. 31, 2011 Patents (non-US No. ZL200710013301.8)	Dec. 31, 2012 Patents (non-US No. ZL200710013301.8)	Mar. 31, 2012 Patents (non-US No. ZL200710013301.8)	Dec. 31, 2012 Patents	Mar. 31, 2012 Patents
Finite-Lived Intangible Assets [Line Items]
Amortization Period	9 years 10 months 24 days			50 years		16 years 6 months		13 years 9 months	13 years 9 months		14 years 11 months 12 days	14 years 11 months 12 days
Intangible assets, gross				$ 1,614,510	$ 1,612,252	$ 7,318,430	$ 7,308,199		$ 9,863,973	$ 9,850,182		$ 1,590,963	$ 1,588,739
Accumulated amortization				(202,597)	(178,052)									(2,257,508)	(1,317,810)
Intangible assets, net		$ 17,927,772	$ 18,863,510	$ 1,411,913	$ 1,434,200									$ 16,515,858	$ 17,429,310