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Patents and Other Intangible Assets - Schedule of Future Amortization Expense (Detail)
$ in Thousands
Dec. 31, 2015
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2016 $ 1,450
2017 1,196
2018 549
2019 551
2020 457
Thereafter 1,099
Total future amortization expense $ 5,302