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Inventories, Net (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Raw materials $ 2,749,000 $ 3,027,000
Work in process 1,257,000 1,503,000
Finished goods 10,349,000 9,193,000
Allowance for excess quantities (561,000) (384,000)
Total inventories $ 13,794,047 $ 13,338,317