Patents and Other Intangible Assets - Schedule of Patents and Other Intangibles Assets (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
---|---|---|
Finite And Indefinite Lived Intangible Assets [Line Items] | ||
Cost | $ 42,324 | $ 43,264 |
Accumulated amortization | (37,022) | (36,112) |
Patents and other intangible assets, net | 5,302 | 7,152 |
Patents [Member] | ||
Finite And Indefinite Lived Intangible Assets [Line Items] | ||
Cost | 35,637 | 35,420 |
Accumulated amortization | (32,088) | (31,198) |
Trademarks—finite lived [Member] | ||
Finite And Indefinite Lived Intangible Assets [Line Items] | ||
Cost | 439 | 596 |
Accumulated amortization | (392) | (469) |
Licenses and other [Member] | ||
Finite And Indefinite Lived Intangible Assets [Line Items] | ||
Cost | 6,248 | 7,248 |
Accumulated amortization | $ (4,542) | $ (4,445) |