Annual report pursuant to Section 13 and 15(d)

Intangible Assets and Related Accumulated Amortization (Detail)

v2.4.0.8
Intangible Assets and Related Accumulated Amortization (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Intangible Assets And Goodwill [Line Items]    
Intangible assets, gross $ 2,800 $ 2,800
Intangible assets, accumulated amortization (2,617) (2,500)
Intangible assets, Impairment      
Intangible assets, net 183 300
Useful life Indefinite life  
Goodwill gross 2,926 2,926
Goodwill 2,926 2,926
Patents
    
Intangible Assets And Goodwill [Line Items]    
Intangible assets, gross 1,914 1,914
Intangible assets, accumulated amortization (1,895) (1,833)
Intangible assets, Impairment      
Intangible assets, net 19 81
Patents | Minimum
    
Intangible Assets And Goodwill [Line Items]    
Useful life 4 years  
Patents | Maximum
    
Intangible Assets And Goodwill [Line Items]    
Useful life 10 years  
Trademarks
    
Intangible Assets And Goodwill [Line Items]    
Useful life 6 years  
Intangible assets, gross 69 69
Intangible assets, accumulated amortization (69) (69)
Intangible assets, Impairment      
Intangible assets, net      
Other Intangible Assets
    
Intangible Assets And Goodwill [Line Items]    
Intangible assets, gross 817 817
Intangible assets, accumulated amortization (653) (598)
Intangible assets, Impairment      
Intangible assets, net $ 164 $ 219
Other Intangible Assets | Minimum
    
Intangible Assets And Goodwill [Line Items]    
Useful life 4 years  
Other Intangible Assets | Maximum
    
Intangible Assets And Goodwill [Line Items]    
Useful life 6 years