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Inventories - Summary of Inventories (Detail) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 235,108 $ 199,257
Finished goods 715,207 999,391
Inventory gross, Total 950,315 1,198,648
Allowance for excess inventory quantities (47,017) (60,166)
Inventories net, Total $ 903,298 $ 1,138,482