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Inventories - Summary of Inventories (Detail) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 184,492 $ 199,257
Finished goods 853,281 999,391
Inventory gross, Total 1,037,773 1,198,648
Allowance for excess inventory quantities (47,017) (60,166)
Inventories net, Total $ 990,756 $ 1,138,482