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Stockholders' Equity
 6 Months Ended
Jun. 30, 2013
Stockholders' Equity [Abstract]  
Stockholders' Equity
16.
Stockholders’ Equity

Common Stock

On December 13, 2010 we raised $10,000,000 in gross proceeds from a sale of 1,428,571 shares of unregistered common stock to Astellas Pharma Inc. for $7.00 per share in a private stock placement.  Pursuant to the terms of the purchase agreement, we granted Astellas Pharma Inc. a two year right of first refusal to enter into a development and commercialization collaboration with us regarding the use of our technology, on a worldwide basis, for the treatment of liver conditions. In addition, we have agreed to use reasonable efforts to file a registration statement with the Securities and Exchange Commission to register the shares of common stock for resale upon the request of Astellas Pharma Inc.  We also granted Astellas Pharma Inc. a non-voting observer seat on our Board of Directors and the right to designate a representative member to our Scientific Advisory Board.  The $10,000,000 in total proceeds we received exceeded the market value of our stock at the completion of the purchase agreement.  The $2,526,000 difference between the proceeds received and the fair market values of our common stock was recorded as a component of deferred revenues in the accompanying balance sheet.  This difference was recorded as deferred revenue since, conceptually, the excess proceeds represent a value paid by Astellas Pharma Inc. attributable to the scientific advisory board seat, the non-voting observer seat on our Board of Directors, and the two year right of first refusal  to enter into a development and commercialization collaboration with us regarding the use of our technology, on a worldwide basis, for the treatment of liver conditions, rather than an additional equity investment in Cytori.  We recognized this deferred amount as development revenue upon the expiration of the two year period in December 2012.  We are still actively involved in discussions with Astellas Pharma, Inc. about a potential future development and commercialization collaboration with us.
In December 2012, we entered into an underwriting agreement with Lazard Capital Markets, LLC (underwriter), relating to the issuance and sale of 7,020,000 shares of our common stock.  The price to the public in this offering was $2.85 per share and the underwriter purchased the shares from us at a price of $2.69 per share.  The transaction was completed on December 19, 2012 raising approximately $20,007,000 in gross proceeds before deducting underwriting discounts and commissions and other offering expenses payable by us. Under the terms of the underwriting agreement, we granted the underwriter an option, exercisable for 30 days, to purchase up to an additional 1,053,000 shares.  Subsequently, in January 2013, the underwriter exercised this option and as a result we sold an additional 1,053,000 shares raising approximately $3,001,000 in gross proceeds before deducting underwriting discounts and commissions and other offering expenses payable by us.

Warrant Adjustments

Our March 2009 offering of 4,771,174 shares of our common stock and warrants to purchase up to a total of 6,679,644 additional shares of our common stock with an exercise price of $2.59 per share, our May 2009 equity offering of 1,864,783 shares of our common stock and warrants to purchase up to a total of 3,263,380 additional shares of our common stock with an exercise price of $2.62 per share, our closings with Seaside 88, LP, our October 2010 offering of 4,600,000 shares of our common stock, our December 2010 sale of 1,428,571 shares of our common stock, our December 2012 offering of 7,020,000 shares of our common stock and our January 2013 sale of 1,053,000 shares of our common stock triggered an adjustment to the exercise price and number of shares issuable under the warrants issued to investors in our August 2008 private placement financing.  As a result, as of June 30, 2013, the common stock warrants issued on August 11, 2008 are currently exercisable for 2,149,062 shares of our common stock at an exercise price of $5.39 per share.

Other Related Party Transactions

During the year ended December 31, 2012, Green Hospital, Inc.’s beneficial ownership decreased to be less than five percent of our outstanding shares of common stock.

During the three and six months ended June 30, 2013, we incurred approximately $0 and $45,000, respectively, and $24,000 and $51,000 during the three and six months ended June 30, 2012, respectively, in royalty costs in connection with sales of our Celution® 800/CRS System products to the European and Asia-Pacific reconstructive surgery market, pursuant to our License and Royalty Agreement and the Amended License/Commercial Agreement with the Olympus-Cytori, Inc. Joint Venture.  Additionally, in February 2012, we purchased second generation Celution® Systems and consumable sets from the Olympus-Cytori, Inc. Joint Venture, at a formula-based transfer price aggregating to $1,048,000.  As of June 30, 2013 and December 31, 2012, Olympus Corporation was a beneficial owner of more than five percent of our outstanding shares of common stock.  Refer to note 4 for discussion of the termination of the Olympus-Cytori Joint Venture.