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Inventories - Summary of Inventories (Detail) (USD $)
Mar. 31, 2014
Mar. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials $ 2,491,135 $ 2,791,811
Work in progress 2,303,800 878,718
Finished goods 2,367,932 1,721,803
Inventories $ 7,162,867 $ 5,392,332