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Inventories (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Inventories [Abstract]    
Raw materials $ 7,533,000 $ 6,386,000
Work-in-process 1,548,000 926,000
Finished goods 6,651,000 6,690,000
Inventory, Total $ 15,732,000 $ 14,002,000