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Inventories, Net (Details) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Raw materials $ 3,469,000 $ 3,027,000
Work in process 1,330,000 1,503,000
Finished goods 10,855,000 9,192,000
Allowance for excess quantities (609,000) (384,000)
Total inventories $ 15,045,063 $ 13,338,317