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Property, Plant and Equipment - Summary of Property, Plant and Equipment Balances (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 15,191,132 $ 10,708,677
Less accumulated depreciation and amortization (9,886,448) (9,333,348)
Property, plant and equipment, net 5,304,684 1,375,329
Building and improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 6,751,393 3,441,192
Machinery and equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total 7,837,140 6,671,866
Furniture and fixtures [Member]
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross, Total $ 602,599 $ 595,619