Acquisitions, Investments, and Licenses - Summary of Investments (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Investment [Line Items]
Investment, available for sale	$ 12,904		$ 4,301
Plus unrealized gains on investments, options and warrants, net	387
Less accumulated losses in investees	(9,855)
Investments, net	26,849	[1]	30,653	[1]
Closing share price at September 30, 2014 for investments available for sale	$ 0.36
Neovasc
Investment [Line Items]
Ownership at September 30, 2014	6.00%
Investment, equity method	3,798
Underlying equity in net assets	1,470
Sevion
Investment [Line Items]
Ownership at September 30, 2014	4.00%
Investment, equity method	750
Underlying equity in net assets	1,026
Pharmsynthez
Investment [Line Items]
Ownership at September 30, 2014	17.00%
Investment, equity method	11,300
Underlying equity in net assets	8,123
Zebra
Investment [Line Items]
Ownership at September 30, 2014	19.00%
Investment, equity method	2,000
Underlying equity in net assets	837
Cocrystal
Investment [Line Items]
Ownership at September 30, 2014	15.00%
Investment, equity method	5,476
Underlying equity in net assets	637
NIMS
Investment [Line Items]
Ownership at September 30, 2014	1.00%
Investment, equity method	89
Underlying equity in net assets	0
RXi
Investment [Line Items]
Ownership at September 30, 2014	11.00%
Investment, available for sale	8,159
Closing share price at September 30, 2014 for investments available for sale	$ 2
Neovasc Options
Investment [Line Items]
Investment, available for sale	925
Closing share price at September 30, 2014 for investments available for sale	$ 5.88
ChromaDex
Investment [Line Items]
Ownership at September 30, 2014	2.00%
Investment, available for sale	1,320
Closing share price at September 30, 2014 for investments available for sale	$ 1.08
ARNO
Investment [Line Items]
Ownership at September 30, 2014	4.00%
Investment, available for sale	2,000
Closing share price at September 30, 2014 for investments available for sale	$ 1.35
Cocrystal Warrants
Investment [Line Items]
Investment, available for sale	$ 500

[1] As of September 30, 2014 and December 31, 2013, total assets include $7.4 million and $6.7 million, respectively, and total liabilities include $13.1 million and $10.4 million, respectively, related to SciVac Ltd (“SciVac”), previously known as SciGen (I.L.) Ltd, a consolidated variable interest entity. SciVac’s consolidated assets are owned by SciVac and SciVac’s consolidated liabilities have no recourse against us. Refer to Note 5.