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Transactions with Olympus Corporation (Details) (USD $)	1 Months Ended							3 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended		3 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, 2013 Cytori [Member]	Dec. 31, 2012 Cytori [Member]	Aug. 31, 2008 Olympus Corporation [Member]	Aug. 31, 2006 Olympus Corporation [Member]	Dec. 31, 2005 Olympus Corporation [Member]	Mar. 31, 2013 Olympus Corporation [Member]	Mar. 31, 2013 Olympus-Cytori, Inc. Joint Venture [Member]	Dec. 31, 2012 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)	7,020,000	1,428,571	4,600,000	1,864,783	4,771,174	1,053,000				1,000,000	1,900,000
Sale of stock, price per share (in dollars per share)										$ 6.00	$ 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)													5.97%
Formation of the Olympus-Cytori Joint Venture [Abstract]
Joint Venture investment carrying value														37,000
Put Option [Abstract]
Put option, repurchase floor							22,000,000
Option liability	2,250,000						2,500,000
Fair Value Inputs [Abstract]
Expected volatility (in hundredths)								78.80%	79.40%					78.80%	79.40%
Bankruptcy recovery rate for Cytori (in hundredths)								28.00%	28.00%
Bankruptcy threshold for Cytori								$ 15,995,000	$ 12,622,000
Probability of a change of control event for Cytori (in hundredths)								1.44%	1.54%
Expected correlation between fair values Cytori and the Joint Venture in the future (in hundredths)								46.00%	46.00%
Risk free interest rate (in hundredths)								1.87%	1.78%

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