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Schedule of Trade Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) $ in Thousands | Jun. 30, 2018 USD ($)
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Trade Receivables |
Contract with Customer Asset and Liability [Line Items] |
Contract with customer asset, balance | $ 9,246
Accrued Revenues |
Contract with Customer Asset and Liability [Line Items] |
Contract with customer asset, balance | 1,718
Accrued Revenues | Royalties |
Contract with Customer Asset and Liability [Line Items] |
Contract with customer asset, balance | 7,035
Deferred Revenue |
Contract with Customer Asset and Liability [Line Items] |
Contract with customer liability, balance | $ 2,717

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