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California Institute for Regenerative Medicine Disease Team Therapy Development Awards (Details Textual) (USD $) In Millions, unless otherwise specified | 1 Months Ended
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Jul. 31, 2012 Spinal Cord Injury [Member] | Sep. 30, 2012 Alzheimer's disease [Member]
California Institute for Regenerative Medicine Disease Team Therapy Development Awards (Textual) [Abstract] |  |
Approval of Fund by California Institute for Regenerative Medicine (CIRM) | $ 20 | $ 20
Approval of Fund by California Institute for Regenerative Medicine (CIRM) maximum period |  | 4 years

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