Organization and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015	Sep. 30, 2016 USD ($) Segment	Sep. 30, 2015	Dec. 31, 2015 USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]
Cash and investments in marketable securities		$ 253,511		$ 253,511		$ 308,944
Senior secured notes		250,000		250,000
Debt and capital lease obligation		254,500		254,500
Capital lease obligations		4,500		4,500
Capital lease obligations, current portion		$ 2,370		$ 2,370		$ 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%