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Schedule of Trade Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) $ in Thousands	Mar. 31, 2018 USD ($)
Trade Receivables
Other Revenues [Line Items]
Contract with customer asset, balance	$ 13,902
Accrued Revenues
Other Revenues [Line Items]
Contract with customer asset, balance	2,455
Accrued Revenues | Royalties
Other Revenues [Line Items]
Contract with customer asset, balance	6,970
Deferred Revenue
Other Revenues [Line Items]
Contract with customer liability, balance	$ 4,973

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
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