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Stockholders' Equity (Details) (USD $)
 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 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
Mar. 31, 2013
Mar. 31, 2012
Feb. 28, 2013
Dec. 31, 2004
Dec. 31, 2012
Green Hospital Supply, Inc [Member]
Feb. 29, 2012
Olympus-Cytori, Inc. Joint Venture [Member]
Mar. 31, 2013
Olympus-Cytori, Inc. Joint Venture [Member]
Mar. 31, 2012
Olympus-Cytori, Inc. Joint Venture [Member]
Aug. 31, 2008
Olympus Corporation [Member]
Aug. 31, 2006
Olympus Corporation [Member]
Mar. 31, 2013
Olympus Corporation [Member]
Dec. 31, 2012
Olympus Corporation [Member]
Dec. 31, 2010
Astellas Pharma Inc. [Member]
Apr. 09, 2012
Seaside 88, LP [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]
Jul. 11, 2011
Seaside 88, LP [Member]
Ten Day Trading Period [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                 1,000,000 1,900,000     1,428,571 5,826,262         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)                             $ 6.00 $ 5.75     $ 7.00   $ 4.52         $ 2.69  
Deferred revenues 2,635,000           232,000   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           67,173,050                           6,326,262 1,326,262 250,000        
Purchase period of common stock                                           30 days 14 days        
Number of closings                                         20 days            
Offering price per share (in dollars per share)                             $ 6.00 $ 5.75     $ 7.00   $ 4.52         $ 2.69  
Purchase price of common stock, percent (in hundredths)                                         88.00%     90.25%      
Trading period                                         10 days            
Proceeds from sale of common stock             3,001,000 4,396,000                       18,233,000 6,000,000            
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                 1,000,000 1,900,000     1,428,571 5,826,262         1,053,000 7,020,000  
Warrants issued to purchase shares of common stock (in shares)       3,263,380 6,679,644                   500,000                       2,145,082
Warrant exercise price (in dollars per share)       $ 2.62 $ 2.59                   $ 8.50                       $ 5.4
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                         45,000 27,000                          
Equipment purchased                       $ 1,048,000