Purchases from Major Suppliers (Detail) (Supplier Concentration Risk, USD $)	3 Months Ended
	Jun. 30, 2012
Concentration Risk [Line Items]
Purchases from major suppliers	$ 4,744,384
Shandong Kangyuan
Concentration Risk [Line Items]
Purchases from major suppliers	2,667,460
Shandong YCT
Concentration Risk [Line Items]
Purchases from major suppliers	1,342,190
Shandong Yongfeng
Concentration Risk [Line Items]
Purchases from major suppliers	$ 734,735