Acquisitions, Investments, and Licenses - Summary of Investments (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Investment [Line Items]
Investment, available for sale	$ 29,005		$ 5,335
Plus unrealized/realized gains on investments, options and warrants, net	2,708
Less accumulated losses in investees	(12,579)
Investments, net	24,690	[1]	15,636	[1]
Sorrento [Member]
Investment [Line Items]
Ownership at September 30, 2013	14.00%
Investment, equity method	2,300
Underlying equity in net assets	821
Cocrystal [Member]
Investment [Line Items]
Ownership at September 30, 2013	16.00%
Investment, equity method	2,500
Underlying equity in net assets	358
Neovasc [Member]
Investment [Line Items]
Ownership at September 30, 2013	6.00%
Investment, equity method	3,798
Underlying equity in net assets	454
Fabrus [Member]
Investment [Line Items]
Ownership at September 30, 2013	13.00%
Investment, equity method	650
Underlying equity in net assets	(108)
BZBE common stock [Member]
Investment [Line Items]
Ownership at September 30, 2013	11.00%
Investment, equity method	1,276
Underlying equity in net assets	(1,184)
RXi [Member]
Investment [Line Items]
Ownership at September 30, 2013	19.00%
Investment, equity method	15,000
Underlying equity in net assets	2,847
Pharmasynthez [Member]
Investment [Line Items]
Ownership at September 30, 2013	11.00%
Investment, equity method	5,036
Underlying equity in net assets	5,156
TESARO [Member]
Investment [Line Items]
Ownership at September 30, 2013	1.00%
Investment, available for sale	56
Closing share price at September 30, 2013 for investments available for sale	$ 38.74
Neovasc Options [Member]
Investment [Line Items]
Investment, available for sale	925
Closing share price at September 30, 2013 for investments available for sale	$ 2.35
BZNE Note and conversion feature [Member]
Investment [Line Items]
Investment, available for sale	1,700
Closing share price at September 30, 2013 for investments available for sale
ChromaDex [Member]
Investment [Line Items]
Ownership at September 30, 2013	1.00%
Investment, available for sale	$ 1,320
Closing share price at September 30, 2013 for investments available for sale	$ 0.81

[1] As of September 30, 2013 and December 31, 2012, total assets include $5.9 million and $5.6 million, respectively, and total liabilities include $8.7 million and $5.5 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.