| 
           Income Taxes (Tables)
  
         | 
        12 Months Ended | 
      
      
        | 
           Dec. 31, 2014 
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        | Income Taxes [Abstract] | 
         
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        | Income Tax Expense By Jurisdiction | 
        
 
		
			
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						Year Ended December 31 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						2014 
				 | 
				
					 
						  
				 | 
				
					 
						2013 
				 | 
				
					 
						  
				 | 
				
					 
						2012 
				 | 
			 
			
				| 
					 
						Currently payable income taxes: 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
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						Federal 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
328,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
2,114,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
1,669,000 
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				| 
					 
						State 
				 | 
				
					 
						  
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(12,000)
				 | 
				
					 
						  
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				 | 
				
297,000 
				 | 
				
					 
						  
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				 | 
				
141,000 
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				| 
					 
						Foreign 
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				 | 
				
113,000 
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				 | 
				
(32,000)
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				 | 
				
(18,000)
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				| 
					 
						  
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				 | 
				
					 
						  
				 | 
				
429,000 
				 | 
				
					 
						  
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				 | 
				
2,379,000 
				 | 
				
					 
						  
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						$ 
				 | 
				
1,792,000 
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				| 
					 
						  
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						Deferred income taxes (benefit): 
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						Federal 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
761,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
(303,000)
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						$ 
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(542,000)
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						State 
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40,000 
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18,000 
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(33,000)
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						Foreign 
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(11,000)
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(33,000)
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(57,000)
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790,000 
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(318,000)
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(632,000)
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						$ 
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1,219,000 
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						$ 
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2,061,000 
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						$ 
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1,160,000 
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        | Reconciliation Of Effective Tax Rate, By Percentage | 
        
 
		
			
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						Year Ended December 31 
				 | 
			 
			
				| 
					 
						  
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						2014 
				 | 
				
					 
						  
				 | 
				
					 
						2013 
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				 | 
				
					 
						2012 
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				| 
					 
						Tax at U.S. statutory rate 
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35.0% 
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35.0% 
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35.0% 
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				| 
					 
						Surtax exemption 
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(0.7)
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(5.4)
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(1.5)
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				| 
					 
						State income taxes, net of federal benefit 
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1.0 
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19.1 
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1.7 
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						Foreign income taxes, net of  
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						  foreign tax credits 
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7.8 
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3.3 
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(0.2)
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						Impairment of goodwill 
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						  - 
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116.2 
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						  - 
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						Other nondeductible items 
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3.1 
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4.9 
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						  - 
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						Effect of (decrease) increase in uncertain tax positions 
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(10.2)
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7.3 
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						  - 
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						Other  
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2.3 
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6.4 
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(0.9)
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						Effective tax rate 
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38.3% 
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186.8% 
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34.1% 
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        | Schedule Of Deferred Tax Assets And Liabilities | 
        
 
		
			
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						2014 
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				 | 
				
					 
						  
				 | 
				
					 
						2013 
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				| 
					 
						Deferred tax assets: 
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				| 
					 
						Allowance for doubtful accounts 
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						$ 
				 | 
				
4,000 
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						$ 
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19,000 
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				| 
					 
						Inventory 
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2,779,000 
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3,295,000 
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						Accrued and prepaid expenses 
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594,000 
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502,000 
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						Domestic net operating loss carry-forward 
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						  - 
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26,000 
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						Long-term compensation plans 
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380,000 
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373,000 
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						Nonemployee director stock compensation 
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403,000 
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243,000 
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				| 
					 
						Other stock compensation 
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118,000 
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111,000 
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				| 
					 
						State income taxes 
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						  - 
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75,000 
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				| 
					 
						Foreign net operating loss carry-forwards and credits 
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1,743,000 
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1,639,000 
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						Gross deferred tax assets 
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6,021,000 
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6,283,000 
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						Valuation allowance 
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(1,734,000)
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(1,618,000)
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				| 
					 
						Net deferred tax assets  
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4,287,000 
				 | 
				
					 
						  
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4,665,000 
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				| 
					 
						  
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						Deferred tax liabilities 
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				| 
					 
						Depreciation 
				 | 
				
					 
						  
				 | 
				
(2,110,000)
				 | 
				
					 
						  
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(1,668,000)
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				| 
					 
						Intangible assets 
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(18,000)
				 | 
				
					 
						  
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(47,000)
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				| 
					 
						  
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				| 
					 
						Gross deferred tax liability 
				 | 
				
					 
						  
				 | 
				
(2,128,000)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(1,715,000)
				 | 
			 
			
				| 
					 
						  
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				 | 
				
					 
						  
				 | 
				
					 
						  
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				| 
					 
						Total net deferred tax asset 
				 | 
				
					 
						$ 
				 | 
				
2,159,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
2,950,000 
				 | 
			 
			
				| 
					 
						  
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        | Schedule Of Unrecognized Tax Benefits | 
        
 
		
			
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						2014 
				 | 
				
					 
						  
				 | 
				
					 
						2013 
				 | 
				
					 
						  
				 | 
				
					 
						2012 
				 | 
			 
			
				| 
					 
						Unrcertain tax positions – January 1 
				 | 
				
					 
						$ 
				 | 
				
240,000 
				 | 
				
					 
						$ 
				 | 
				
153,000 
				 | 
				
					 
						$ 
				 | 
				
234,000 
				 | 
			 
			
				| 
					 
						Gross increases - tax positions in prior period  
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
			 
			
				| 
					 
						Gross decreases - tax positions in prior period 
				 | 
				
					 
						  
				 | 
				
(73,000)
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
			 
			
				| 
					 
						Gross increases - current period tax positions 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
158,000 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
			 
			
				| 
					 
						Settlements 
				 | 
				
					 
						  
				 | 
				
(85,000)
				 | 
				
					 
						  
				 | 
				
(5,000)
				 | 
				
					 
						  
				 | 
				
0 
				 | 
			 
			
				| 
					 
						Expiration of statute of limitations 
				 | 
				
					 
						  
				 | 
				
(7,000)
				 | 
				
					 
						  
				 | 
				
(66,000)
				 | 
				
					 
						  
				 | 
				
(81,000)
				 | 
			 
			
				| 
					 
						Uncertain tax positions – December 31, 2014 
				 | 
				
					 
						$ 
				 | 
				
75,000 
				 | 
				
					 
						$ 
				 | 
				
240,000 
				 | 
				
					 
						$ 
				 | 
				
153,000 
				 | 
			 
		  
		
			 
		 
		  
	   
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