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DIVESTITURE OF STEM CELL ASSETS (Details) (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Series A common stock	Oct. 02, 2013 Asset contribution agreement BioTime Contributions Asterias item	Oct. 02, 2013 Asset contribution agreement Asterias contributions BioTime	Oct. 02, 2013 Contribution Agreement Asterias contributions Geron ruling
DIVESTITURE OF STEM CELL ASSETS
Number of rulings in favor of ViaCyte, Inc. for which the entity was substituted as a party in an appeal					2
Amount of debt forgiven			$ 5,000,000
Shares issued			8,902,077	21,773,340	6,537,779
Percentage ownership in Asterias					21.40%
Percentage ownership in Asterias				71.60%
Term of warrants issued			5 years	3 years
Number of warrants issued			8,000,000	3,150,000
Exercise price of warrants issued (in dollars per share)			$ 5.00	$ 5.00
Number of subsidiaries for which minority interests were contributed			2
Carrying value of common stock		0
Gain or loss recognized on assets surrendered	0
Carrying value of stem cell assets	0
Liability relating to contractual obligation to distribute common stock		$ 0

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- Definition

Represents the amount of carrying value of stem cell assets as of the balance sheet date.

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Represents the carrying value assigned to Asterias Series A common stock received in stem cell divestiture.

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Represents the number of BioTime subsidiaries in which minority stakes were included as part of the consideration given by BioTime for the acquisition.

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Represents the amount of gain (loss) recognized on assets surrendered.

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Percentage of investee's stock owned immediately after all stock transactions.

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Represents the amount of liability related to contractual obligation to distribute Asterias Series A common stock received in stem cell divestiture.

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Represents the principal amount of debt forgiven by BioTime for Asterias.

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Represents the number of rulings in favor of ViaCyte, Inc. for which Asterias was substituted for Geron as a party in an appeal.

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Represents the term of the warrants issued by the legal entity.

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Exercise price per share or per unit of warrants or rights outstanding.

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Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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