Annual report pursuant to Section 13 and 15(d)

Intangible Assets Related to Accumulated Amortization and Goodwill (Detail)

v2.4.0.6
Intangible Assets Related to Accumulated Amortization and Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Intangible Assets And Goodwill [Line Items]    
Gross $ 2,800 $ 2,576
Accumulated Amortization (2,500) (2,364)
Impairment      
Net 300 212
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 (1,833) (1,702)
Impairment      
Net 81 212
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 817 593
Accumulated Amortization (598) (593)
Impairment      
Net $ 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