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Inventories, Net (Details) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Inventory [Line Items]    
Raw materials $ 3,711,652 $ 3,342,528
Work in process 1,369,159 1,149,704
Finished goods 12,319,254 11,673,872
Allowance for excess quantities (748,830) (737,691)
Total inventories $ 16,651,235 $ 15,428,413