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STOCKHOLDERS' EQUITY
 6 Months Ended
Jun. 30, 2012
Stockholders' Equity Attributable to Parent [Abstract]  
Stockholders' Equity Note Disclosure [Text Block]
STOCKHOLDERS’ EQUITY
Common Stock.
At our Annual Meeting of Stockholders, held on May 23, 2012, our stockholders approved an amendment to our certificate of incorporation to increase the authorized number of shares of our common stock from 100,000,000 to 150,000,000. Our Board of Directors is authorized to issue up to 150,000,000 shares of common stock, from time to time, as provided in a resolution or resolutions adopted by the Board of Directors.
On February 7, 2012 we entered into definitive agreements with institutional and other accredited investors and raised approximately $22.0 million in a private placement financing ("Private Placement"), which includes an aggregate of $3.0 million in convertible notes issued in December 2011 to entities associated with Third Security, LLC, a related party, that automatically convert into shares of our common stock and warrants to purchase such common stock on the same terms as all investors in the Private Placement. Pursuant to the purchase agreement, we issued an aggregate of 19,000,000 shares of our common stock at a price per share of $1.00, as well as five-year warrants to purchase up to an aggregate of 9,500,000 shares of common stock with an exercise price of $1.25 per share. In connection with the conversion of the convertible notes issued by us to the entities associated with Third Security, LLC, the entities received an aggregate of 3,000,000 shares of common stock and 1,500,000 warrants on the same terms as all investors in the Private Placement. The costs incurred to complete the Private Placement were recorded as a reduction in equity in the amount of $1.5 million. Net proceeds from this offering will be used for general corporate and working capital purposes, primarily to accelerate development of several of our key initiatives.

Pursuant to our equity financing completed in February 2012, we are obligated to pay PGxHealth, LLC (“PGx”) an aggregate of $5.5 million as a prepayment under the senior secured promissory note (the “Note”). We have accounted for the full prepayment amount as a current liability as of June 30, 2012. We have contacted PGx on numerous occasions to make arrangements for the prepayment to PGx in accordance with the terms of the Note, as well as to coordinate the timing of the prepayment. However, PGx has not responded to any of our outreach efforts. We made our initial payment of $1.2 million under the Note in June 2012, and intend to continue to comply with the original terms of the Note.
Common Stock Warrants.
Common stock warrants issued during the three and six months ended June 30, 2012 were 0 and 11,000,000, respectively, and none of the issued warrants were exercised. No common stock warrants were issued or exercised during the three and six months ended June 30, 2011. Warrants to purchase an aggregate of 16,172,408 shares of common stock were outstanding at June 30, 2012.
 
Warrant Holder
 
Issue Year
 
Expiration
 
Underlying
Shares
 
Exercise
Price
Affiliates of Third Security, LLC(1)
 
2010
 
December 2015
 
5,172,408
 
$0.58
Various Institutional Holders(2)
 
2012
 
February 2017
 
9,500,000
 
$1.25
Affiliates of Third Security, LLC(2)
 
2012
 
February 2017
 
1,500,000
 
$1.25
 
 
 
 
 
 
16,172,408
 
 
(1)
This Warrant was issued in connection with the issuance of warrants to purchase shares of our Series A Preferred Stock to affiliates of Third Security, LLC in December 2010. The number of underlying shares shown reflects the number of shares of common stock issuable upon conversion of the shares of Series A Preferred Stock for which this Warrant is currently exercisable.
(2)
These Warrants were issued in connection with the Private Placement completed in February 2012.