Cash received for the settlement of litigation during the current period.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 27

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

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

SUBSEQUENT EVENTS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
	Apr. 27, 2010 Celgene Corporation patent	Jan. 11, 2013 Preferred stock	Apr. 03, 2013 Subsequent event Celgene Corporation patent	Apr. 05, 2013 Subsequent event Preferred stock
Subsequent events
Cash dividend declared per share (in dollars per share)		$ 0.15		$ 0.15
Number of patents in litigation	4
Number of patents in litigation sold under the definitive agreement			4
One time payment received under the definitive agreement			$ 5.5