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Inventories (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Components of Inventories    
Raw materials $ 4,900,000 $ 4,979,000
Work in process 8,907,000 5,410,000
Finished goods 14,862,000 16,136,000
Inventories 28,669,000 26,525,000
Inventory reclassified from raw materials to work in process   4,200,000
Inventory, step-up value $ 200,000 $ 4,000,000