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Property, Plant and Equipment - Additional Information (Detail) (USD $)
1 Months Ended 12 Months Ended
Oct. 09, 2013
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment (Textual) [Abstract]      
Depreciation charges   $ 742,000 $ 765,000
Gain on sale of property and improvements 128,000 143,000 24,000
Cost of sales
     
Property, Plant and Equipment (Textual) [Abstract]      
Depreciation charges   580,000 605,000
Selling, General and Administrative Expenses
     
Property, Plant and Equipment (Textual) [Abstract]      
Depreciation charges   $ 162,000 $ 160,000