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Components of Inventories (Detail) (USD $)
Sep. 30, 2012
Mar. 31, 2012
Inventory Disclosure [Line Items]    
Raw materials $ 1,233,664 $ 272,873
Work-in-progress 1,201,839 414,390
Finished goods 1,326,102 1,291,225
Total Inventories $ 3,761,605 $ 1,978,488