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Inventories - Summary of Inventories (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Inventory, Net [Abstract]    
Raw materials $ 467,761 $ 467,761
Inventories, gross 467,761 467,761
Less provision for obsolete inventory (467,761) (467,761)
Inventories, net $ 0 $ 0