Annual report pursuant to Section 13 and 15(d)

Information Concerning Industry Segments And Major Customers (Narrative) (Details)

v2.4.0.8
Information Concerning Industry Segments And Major Customers (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]      
Number of segments 3    
Sales [Member] | JDL Technologies [Member]
     
Segment Reporting Information [Line Items]      
Concentration risk percentage 17.50%    
Sales [Member] | Suttle [Member]
     
Segment Reporting Information [Line Items]      
Concentration risk percentage 18.70% 16.60%  
Sales [Member] | Transition Networks [Member]
     
Segment Reporting Information [Line Items]      
Concentration risk percentage   10.60% 22.80%
Foreign Countries [Member] | Suttle [Member]
     
Segment Reporting Information [Line Items]      
Long-lived assets $ 1,225 $ 1,067  
United States [Member] | Sales [Member]
     
Segment Reporting Information [Line Items]      
Concentration risk percentage 87.00% 83.00% 85.00%