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Inventories (Details) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Inventories [Abstract]    
Raw materials $ 1,466,000 $ 1,315,000
Work in process 772,000 232,000
Finished goods 2,250,000 2,147,000
Inventory, net $ 4,488,000 $ 3,694,000