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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
	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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