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Patents and Other Intangible Assets - Schedule of Future Amortization Expense (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2017 $ 1,524
2018 886
2019 736
2020 785
2021 743
Thereafter 2,787
Total future amortization expense $ 7,461