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Stockholders' Equity (Details) (USD $)
 1 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2010
Oct. 31, 2010
May 31, 2009
Mar. 31, 2009
Aug. 31, 2008
Jun. 30, 2013
Jun. 30, 2012
Feb. 28, 2013
Dec. 31, 2004
Dec. 31, 2012
Green Hospital Supply, Inc [Member]
Feb. 29, 2012
Olympus-Cytori, Inc. Joint Venture [Member]
Jun. 30, 2013
Olympus-Cytori, Inc. Joint Venture [Member]
Jun. 30, 2012
Olympus-Cytori, Inc. Joint Venture [Member]
Jun. 30, 2013
Olympus-Cytori, Inc. Joint Venture [Member]
Jun. 30, 2012
Olympus-Cytori, Inc. Joint Venture [Member]
Jun. 30, 2013
Olympus Corporation [Member]
Dec. 31, 2012
Olympus Corporation [Member]
Dec. 31, 2010
Astellas Pharma Inc. [Member]
Jul. 11, 2011
Seaside 88, LP [Member]
Jul. 11, 2011
Seaside 88, LP [Member]
Initial Closing Period [Member]
Jul. 11, 2011
Seaside 88, LP [Member]
Every Two Weeks [Member]
Dec. 19, 2012
Lazard Capital Markets, LLC [Member]
Dec. 31, 2012
Lazard Capital Markets, LLC [Member]
Dec. 31, 2012
Warrants issued August 2008 [Member]
Common Stock [Abstract]                                                  
Proceeds from private placement of stock                                     $ 10,000,000       $ 20,007,000 $ 3,001,000  
Common stock issued (in shares) 7,020,000 1,428,571 4,600,000 1,864,783 4,771,174 1,053,000                         1,428,571       1,053,000 7,020,000  
Common stock at a purchase price (in dollars per unit)                                               $ 2.85  
Sale of stock, price per share (in dollars per share)                                     $ 7.00         $ 2.69  
Deferred revenues 2,635,000           235,000   2,379,000 1,500,000                 2,526,000            
Expected expiration period for recognition of deferred amount   2 years                                              
Common stock, shares issued (in shares) 65,914,050           67,235,591                                    
Purchase period of common stock                                         30 days 14 days      
Offering price per share (in dollars per share)                                     $ 7.00         $ 2.69  
Trading period                                       10 days          
Proceeds from sale of common stock             3,001,000 4,946,000                                  
Warrant Adjustments [Abstract]                                                  
Common stock issued (in shares) 7,020,000 1,428,571 4,600,000 1,864,783 4,771,174 1,053,000                         1,428,571       1,053,000 7,020,000  
Warrants issued to purchase shares of common stock (in shares)       3,263,380 6,679,644                                       2,149,062
Warrant exercise price (in dollars per share)       $ 2.62 $ 2.59                                       $ 5.39
Related Party Transaction [Line Items]                                                  
Beneficial owner, minimum ownership percentage (in hundredths)                                 5.00% 5.00%              
Beneficial owner, maximum ownership percentage (in hundredths)                     5.00%                            
Royalty costs in connection with sales                         0 24,000 45,000 51,000                  
Equipment purchased                       $ 1,048,000