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Nature Of Business And Summary Of Significant Accounting Policies (Economic Useful Lives Of Property, Plant And Equipment) (Details)
12 Months Ended
Dec. 31, 2018
Building  
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment useful life 30 years
Machinery and equipment | Minimum  
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment useful life 5 years
Machinery and equipment | Maximum  
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment useful life 12 years
Office furniture and fixtures | Minimum  
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment useful life 3 years
Office furniture and fixtures | Maximum  
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]  
Property, plant and equipment useful life 5 years