Annual report pursuant to section 13 and 15(d)

Impairment Charges for Other Intangible Assets (Detail)

v2.4.0.8
Impairment Charges for Other Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Patents
Dec. 31, 2012
Patents
Dec. 31, 2013
Trademarks
Dec. 31, 2012
Trademarks
Dec. 31, 2013
Product Certification And Licensing Costs
Dec. 31, 2012
Product Certification And Licensing Costs
Dec. 31, 2013
LED Replacement Lamps and Fixtures
Dec. 31, 2013
LED Replacement Lamps and Fixtures
Patents
Dec. 31, 2013
LED Replacement Lamps and Fixtures
Trademarks
Dec. 31, 2013
LED Replacement Lamps and Fixtures
Product Certification And Licensing Costs
Finite-Lived Intangible Assets [Line Items]                        
Gross Carrying Amount $ 21,601 $ 12,926 $ 268 $ 268 $ 6,034 $ 4,314 $ 61 $ 61 $ 1,227 $ 1,073 $ 29 $ 125
Accumulated Amortization (3,732) (873) (130) (107) (615) (250) (46) (29) (212) (139) (3) (70)
Net Carrying Amount Prior to Impairment                 1,015 934 26 55
Impairment Recognized                 (1,015) (934) (26) (55)
Net Carrying Amount at December 31, 2012 $ 17,869 $ 12,053 $ 138 $ 161 $ 5,419 $ 4,064 $ 15 $ 32