Acquisitions, Investments, and Licenses (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012		Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 119,061	[1]	$ 27,361	[1]	$ 38,171	$ 71,516
Accounts receivable, net	22,227	[1]	21,162	[1]
Inventory, net	19,778	[1]	22,261	[1]
Prepaid expenses and other current assets	19,023	[1]	7,873	[1]
Total current assets	230,116	[1]	78,657	[1]
Property, plant and equipment, net	16,577	[1]	16,526	[1]
Intangible assets, net	79,775	[1]	84,238	[1]
Goodwill	82,086	[1]	80,450	[1]
Other assets	2,784	[1]	2,777	[1]
Total assets	641,080	[1]	289,830	[1]
Current liabilities:
Accounts payable	11,646	[1]	10,200	[1]
Accrued expenses	31,045	[1]	24,656	[1]
Total current liabilities	59,469	[1]	52,382	[1]
Other long-term liabilities	80,603	[1]	34,168	[1]
Total liabilities	328,596	[1]	86,550	[1]
SciVac [Member]
Current assets:
Cash and cash equivalents	363		174
Accounts receivable, net	266		387
Inventory, net	1,573		1,092
Prepaid expenses and other current assets	132		199
Total current assets	2,334		1,852
Property, plant and equipment, net	1,425		1,539
Intangible assets, net	1,128		1,154
Goodwill	822		796
Other assets	298		231
Total assets	6,007		5,572
Current liabilities:
Accounts payable	1,254		1,108
Accrued expenses	5,157		2,859
Notes payable	1,132		0
Total current liabilities	7,543		3,967
Other long-term liabilities	282		1,529
Total liabilities	$ 7,825		$ 5,496

[1] As of June 30, 2013 and December 31, 2012, total assets include $6.0 million and $5.6 million, respectively, and total liabilities include $7.8 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 are those as to which there is no recourse against us. Refer to Note 5.