Subsequent Events	9 Months Ended
Sep. 30, 2014
Subsequent Events [Abstract]
Subsequent Events	12. Subsequent Events On October 1, 2014, Asterias completed the BioTime Warrants Distribution by distributing 8,000,000 BioTime Warrants on a pro rata basis to the holders of Asterias Series A Shares. On October 3, 2014 Asterias converted its Series B Shares into Series A Shares and began trading on the NYSE MKT under the ticker symbol “AST” on October 8, 2014. On October 3, 2014, certain BioTime subsidiaries sold 504,600 BioTime common shares that they held. Those shares were sold through Cantor Fitzgerald & Co., as sales agent, at $3.12 per share for aggregate gross proceeds of approximately $1,574,352. On October 8, 2014, BioTime sold 9,431,398 common shares for $29,425,962 in a transaction registered under the Securities Act of 1933, as amended. The $3.12 price per share was the closing price of BioTime common shares on the NYSE MKT on October 2, 2014, the date on which BioTime and the investors agreed upon the purchase price. BioTime paid no fees or commissions to broker-dealers or any finder’s fees, and did not issue any stock purchase warrants, in connection with the offer and sale of the shares. Broadwood Partners, L.P., purchased 4,040,523 shares, and three of BioTime’s current directors also purchased 96,150 shares in the offering. On October 16, 2014, Asterias signed a Notice of Grant Award ("NGA") with the California Institute of Regenerative Medicine ("CIRM"), effective October 1, 2014, with respect to a $14.3 million CIRM grant award for clinical development of Asterias’ product, AST-OPC1. The NGA includes the terms under which CIRM will release grant funds to Asterias. Asterias received the first payment of grant funds in the amount of $916,554 during October 2014. We evaluated subsequent events through the issuance date of the financial statements. We are not aware of any significant events that occurred subsequent to the balance sheet date but prior to the filing of this Quarterly Report on Form 10-Q that would have a material impact on our financial statements.

12. Subsequent Events

On October 1, 2014, Asterias completed the BioTime Warrants Distribution by distributing 8,000,000 BioTime Warrants on a pro rata basis to the holders of Asterias Series A Shares.

On October 3, 2014 Asterias converted its Series B Shares into Series A Shares and began trading on the NYSE MKT under the ticker symbol “AST” on October 8, 2014.

On October 3, 2014, certain BioTime subsidiaries sold 504,600 BioTime common shares that they held. Those shares were sold through Cantor Fitzgerald & Co., as sales agent, at $3.12 per share for aggregate gross proceeds of approximately $1,574,352.

On October 8, 2014, BioTime sold 9,431,398 common shares for $29,425,962 in a transaction registered under the Securities Act of 1933, as amended. The $3.12 price per share was the closing price of BioTime common shares on the NYSE MKT on October 2, 2014, the date on which BioTime and the investors agreed upon the purchase price. BioTime paid no fees or commissions to broker-dealers or any finder’s fees, and did not issue any stock purchase warrants, in connection with the offer and sale of the shares. Broadwood Partners, L.P., purchased 4,040,523 shares, and three of BioTime’s current directors also purchased 96,150 shares in the offering.

On October 16, 2014, Asterias signed a Notice of Grant Award ("NGA") with the California Institute of Regenerative Medicine ("CIRM"), effective October 1, 2014, with respect to a $14.3 million CIRM grant award for clinical development of Asterias’ product, AST-OPC1. The NGA includes the terms under which CIRM will release grant funds to Asterias. Asterias received the first payment of grant funds in the amount of $916,554 during October 2014.

We evaluated subsequent events through the issuance date of the financial statements. We are not aware of any significant events that occurred subsequent to the balance sheet date but prior to the filing of this Quarterly Report on Form 10-Q that would have a material impact on our financial statements.