Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Related to Accumulated Amortization and Goodwill (Detail)

v2.4.0.8
Intangible Assets Related to Accumulated Amortization and Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Intangible Assets And Goodwill [Line Items]    
Gross $ 2,800 $ 2,800
Accumulated Amortization (2,583) (2,500)
Impairment      
Net 217 300
Useful life Indefinite life  
Gross 2,926 2,926
Net 2,926 2,926
Patents
   
Intangible Assets And Goodwill [Line Items]    
Gross 1,914 1,914
Accumulated Amortization (1,888) (1,833)
Impairment      
Net 26 81
Trademarks
   
Intangible Assets And Goodwill [Line Items]    
Useful life 6 years  
Gross 69 69
Accumulated Amortization (69) (69)
Impairment      
Net      
Other Intangible Assets
   
Intangible Assets And Goodwill [Line Items]    
Gross 817 817
Accumulated Amortization (626) (598)
Impairment      
Net $ 191 $ 219
Minimum | Patents
   
Intangible Assets And Goodwill [Line Items]    
Useful life 4 years  
Minimum | Other Intangible Assets
   
Intangible Assets And Goodwill [Line Items]    
Useful life 4 years  
Maximum | Patents
   
Intangible Assets And Goodwill [Line Items]    
Useful life 10 years  
Maximum | Other Intangible Assets
   
Intangible Assets And Goodwill [Line Items]    
Useful life 6 years