Net Land Use Right and Purchased Patent (Detail) (USD $)	1 Months Ended	3 Months Ended
	Oct. 31, 2011	Sep. 30, 2012	Mar. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net		$ 18,090,089	$ 18,863,510
Land use rights
Finite-Lived Intangible Assets [Line Items]
Amortization Period		50 years
Intangible assets, gross		1,600,378	1,612,252
Accumulated amortization		(192,766)	(178,052)
Intangible assets, net		1,407,613	1,434,200
Patent 1
Finite-Lived Intangible Assets [Line Items]
Amortization Period		16 years 6 months
Intangible assets, gross		7,254,375	7,308,199
Patents (non-US No. ZL200510045001.9)
Finite-Lived Intangible Assets [Line Items]
Amortization Period	13 years 9 months	13 years 9 months
Intangible assets, gross		9,777,638	9,850,182
Patents (non-US No. ZL200710013301.8)
Finite-Lived Intangible Assets [Line Items]
Amortization Period	14 years 11 months 12 days	14 years 11 months 12 days
Intangible assets, gross		1,577,038	1,588,739
Patents
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		(1,926,575)	(1,317,810)
Intangible assets, net		$ 16,682,476	$ 17,429,310