Equity	9 Months Ended
Sep. 30, 2013
Equity [Abstract]
Equity	Note 11—Equity Preferred stock The Company is authorized to issue 5,000,000 shares of preferred stock in one or more series and to fix the rights, preferences, privileges, and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting any series or the designation of such series, any or all of which may be greater than the rights of common stock. The issuance of the Company’s preferred stock could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend payments and payments upon liquidation. In addition, the issuance of preferred stock could have the effect of delaying, deferring or preventing a change of control of the Company or other corporate action. There are no preferred shares issued or outstanding as of September 30, 2013. The Company recorded accrued dividends at a rate of 6% per annum on previously issued shares of Series D preferred stock and 8% per annum on previously issued shares of Series E preferred stock. The Company accrued dividends payable of $0.3 million, and paid cash of $0.2 million in dividends during the nine months ended September 30, 2012. Common stock In connection with the execution of the Amendment on June 28, 2013 between the Company and Intrexon, the Company entered into a Supplemental Stock Issuance Agreement with Intrexon. The Company agreed to issue to Intrexon, who is an affiliate of NRM VII Holdings I, LLC, the Company’s largest shareholder, a number of shares of Company common stock valued at $7.5 million based on a per share value of $6.03 per share, the closing price of the Company’s common stock on the NYSE MKT on the day prior to execution of the Supplemental Stock Issuance Agreement (the Supplemental Access Fee Shares). The Supplemental Access Fee Shares were issued upon the satisfaction of customary closing conditions, including the approval for the listing of the Supplemental Access Fee Shares on the NYSE MKT. The closing took place on July 26, 2013. We recorded a fair value of $6.4 million for 1,243,781 shares issued to Intrexon for the closing of the Supplemental Stock Issuance Agreement as a research and development expense in the third quarter 2013.

Equity

9 Months Ended

Sep. 30, 2013

Note 11—Equity

Preferred stock

The Company is authorized to issue 5,000,000 shares of preferred stock in one or more series and to fix the rights, preferences, privileges, and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting any series or the designation of such series, any or all of which may be greater than the rights of common stock. The issuance of the Company’s preferred stock could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend payments and payments upon liquidation. In addition, the issuance of preferred stock could have the effect of delaying, deferring or preventing a change of control of the Company or other corporate action. There are no preferred shares issued or outstanding as of September 30, 2013. The Company recorded accrued dividends at a rate of 6% per annum on previously issued shares of Series D preferred stock and 8% per annum on previously issued shares of Series E preferred stock. The Company accrued dividends payable of $0.3 million, and paid cash of $0.2 million in dividends during the nine months ended September 30, 2012.

Common stock

In connection with the execution of the Amendment on June 28, 2013 between the Company and Intrexon, the Company entered into a Supplemental Stock Issuance Agreement with Intrexon. The Company agreed to issue to Intrexon, who is an affiliate of NRM VII Holdings I, LLC, the Company’s largest shareholder, a number of shares of Company common stock valued at $7.5 million based on a per share value of $6.03 per share, the closing price of the Company’s common stock on the NYSE MKT on the day prior to execution of the Supplemental Stock Issuance Agreement (the Supplemental Access Fee Shares). The Supplemental Access Fee Shares were issued upon the satisfaction of customary closing conditions, including the approval for the listing of the Supplemental Access Fee Shares on the NYSE MKT. The closing took place on July 26, 2013. We recorded a fair value of $6.4 million for 1,243,781 shares issued to Intrexon for the closing of the Supplemental Stock Issuance Agreement as a research and development expense in the third quarter 2013.