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Future Minimum Royalties Payable (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Contractual Obligation [Line Items]  
Future minimum royalties payable under license agreements, 2019 $ 7,927
Future minimum royalties payable under license agreements, 2020 8,485
Future minimum royalties payable under license agreements, 2021 8,942
Future minimum royalties payable under license agreements, 2022 926
Future minimum royalties payable under license agreements, 2023 156
Total $ 26,436