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Inventories, Net (Details) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Raw materials $ 4,103,000 $ 3,486,000
Work in process 1,279,000 1,388,000
Finished goods 10,596,000 11,576,000
Allowance for excess quantities (708,000) (636,000)
Total inventories $ 15,269,890 $ 15,813,276