Financing Arrangements (Tables)

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Summary of carrying values and coupon rates on financing arrangements

The carrying values and the fixed contractual coupon rates of the Company's financing arrangements as of June 30, 2015 and December 31, 2014 were as follows (in thousands):

	June 30, 2015			December 31, 2014
2019 Convertible Senior Notes
Principal amount outstanding	$	245,000		$	245,000
Unamortized discount	(44,433		)	(49,092		)
Net carrying amount	200,567			195,908
Convertible notes payable, Viking Therapeutics, Inc.	—			334
Total notes payable	$	200,567		$	196,242