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Transactions with Olympus Corporation (Details) (USD $)
 1 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2010
May 31, 2009
Mar. 31, 2009
Sep. 30, 2012
Dec. 31, 2011
Aug. 31, 2008
Sep. 30, 2012
Cytori [Member]
Dec. 31, 2011
Cytori [Member]
Aug. 31, 2008
Olympus Corporation [Member]
Aug. 31, 2006
Olympus Corporation [Member]
Dec. 31, 2005
Olympus Corporation [Member]
Sep. 30, 2012
Olympus Corporation [Member]
Dec. 31, 2011
Olympus Corporation [Member]
Sep. 30, 2012
Olympus-Cytori, Inc. Joint Venture [Member]
Dec. 31, 2011
Olympus-Cytori, Inc. Joint Venture [Member]
Initial investment by Olympus Corporation in Cytori [Abstract]                              
Related party transactions                 $ 6,000,000 $ 11,000,000 $ 11,000,000        
Common stock issued (in shares) 4,600,000 1,864,783 4,771,174           1,000,000 1,900,000          
Sale of stock, price per share (in dollars per share)                 $ 6 $ 5.75          
Warrants issued to purchase shares of common stock (in shares)   3,263,380 6,679,644           500,000            
Warrant exercise price (in dollars per share)   $ 2.62 $ 2.59     $ 8.50                  
Beneficial Owner, ownership percentage (in hundredths)                       6.80% 7.10%    
Formation of the Olympus-Cytori Joint Venture [Abstract]                              
Joint Venture investment carrying value                           122,000  
Put/Calls and Guarantees [Abstract]                              
Put Option, Repurchase Floor       22,000,000                      
Option liability       2,400,000 1,910,000                    
Fair Value Inputs [Abstract]                              
Expected volatility (in hundredths)       74.94% 69.98%   78.50% 76.07%           78.50% 76.07%
Bankruptcy recovery rate for Cytori (in hundredths)             28.00% 28.00%              
Bankruptcy threshold for Cytori             $ 21,894,000 $ 8,594,000              
Probability of a change of control event for Cytori (in hundredths)             1.44% 3.33%              
Expected correlation between fair values and Joint Venture (in hundredths)             99.00% 99.00%              
Risk free interest rate (in hundredths)       0.17% 0.19%   1.65% 1.89%