Intangible Assets and Goodwill - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended
May 29, 2013	Jun. 30, 2013 ZEVALIN [Member]	Jun. 30, 2013 FOLOTYN [Member]	Jun. 30, 2013 FUSILEV [Member]
Product Rights [Line Items]
Impairment	$ 1,023,000
Intangible amortization		3,300,000	5,600,000
Intangible amortization included cost of product sales				$ 1,000,000

The amount of expense recognized in the current period that reflects the allocation of the costs of intangible assets over the expected benefit period of such assets. This element applies only to intangible assets used in the production of goods.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_CostOfGoodsSoldAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration