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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2016 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015	Jun. 30, 2016 USD ($) Segment	Jun. 30, 2015	Dec. 31, 2015 USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]
Cash and investments in marketable securities		$ 274,854		$ 274,854		$ 308,944
Senior secured notes		250,000		250,000
Debt and capital lease obligation		256,400		256,400
Capital lease obligations		6,400		6,400
Capital lease obligations, current portion		$ 3,616		$ 3,616		$ 4,756
Number of business segments | Segment				1
Senior Secured Notes
Organization And Summary Of Significant Accounting Policies [Line Items]
Reclassification of capitalized issuance costs	$ 400
Liability Related To Future Royalties Liability Balances
Organization And Summary Of Significant Accounting Policies [Line Items]
Reclassification of capitalized issuance costs	$ 3,000
India
Organization And Summary Of Significant Accounting Policies [Line Items]
Effective income tax rate – India		35.00%	35.00%	35.00%	35.00%

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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