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Goodwill and Intangible Assets (Narrative) (Details) (USD $)
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Goodwill [Line Items]    
Patent application costs $ 72,000 $ 103,000
Patent and patent acquisition costs 2,500,000 0
Acquired patents and patent rights 27,852,000  
Goodwill 12,221  
Estimate income tax benefit 9,200,000  
Write-off of goodwill amount 239,000  
Customer list [Member]
    
Goodwill [Line Items]    
Write-off amount, gross 258,000  
Write-off amount 198,000  
Non-compete agreement [Member]
    
Goodwill [Line Items]    
Write-off amount, gross 150,000  
Write-off amount $ 80,000  
Minimum [Member] | Patents and Patent Rights [Member]
    
Goodwill [Line Items]    
Useful Life 2 years 6 months  
Maximum [Member] | Patents and Patent Rights [Member]
    
Goodwill [Line Items]    
Useful Life 7 years 6 months