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Deferred Revenue	12 Months Ended
	Dec. 31, 2011
Deferred Revenue [Abstract]
Deferred Revenue	Note 15. Deferred Revenue Deferred Revenue related to Licensing Agreement In August 2006, we entered an agreement with Stem Cell Therapeutics (SCT), a Canadian corporation, granting it a non-exclusive, royalty-bearing license to use several of our patents for treating specified diseases of the central nervous system; the grant does not include any rights to cell transplantation. SCT granted StemCells a royalty-free non-exclusive license to certain of its patents for research and development and a royalty-bearing non-exclusive for certain commercial purposes. SCT paid an up-front license fee; the license also provides for other payments including annual maintenance, milestones, and royalties. The up-front license fee is being amortized and recognized as revenue over a period of 12 years. At December 31, 2011, the unamortized amount of deferred revenue related to this agreement was approximately $140,000.

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The entire disclosure for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.3(b).Q1(c),(b).Q2,(c).Q3)

-URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780



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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Concepts (CON)

-Number 5

-Paragraph 83, 84

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-Subparagraph (b)

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