Components of Inventories (Detail) (USD $)	Dec. 31, 2012	Mar. 31, 2012
Inventory Disclosure [Line Items]
Raw materials	$ 1,112,873	$ 272,873
Work-in-progress	668,309	414,390
Finished goods	779,870	1,291,225
Total Inventories	$ 2,561,052	$ 1,978,488