Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity

Stockholders' Equity
3 Months Ended
Mar. 31, 2014
Stockholders' Deficit [Abstract]  
Stockholders Equity Note Disclosure [Text Block]
9. Stockholders’ Equity
Common Stock
In November 2013, we entered into a stock purchase agreement with Braeburn pursuant to which we sold 6,250,000 shares of our common stock for an aggregate purchase price of $5.0 million, or $0.80 per share.
In April 2013, 144,499 shares of common stock were issued to a former lender upon the cashless net exercise of 287,356 warrants in accordance with the terms of the warrants.
In January and March 2013, Series A Warrants to purchase 1,109,010 shares of common stock were exercised resulting in gross proceeds of approximately $1,275,000.
On February 6, 2013, the facility agreement with Deerfield was amended to provide that the exercise price of the Deerfield Warrants could be satisfied through a reduction in the principal amount of our outstanding indebtedness to Deerfield. In February and March 2013, Deerfield exercised the 6,000,000 Deerfield Warrants resulting in a $7.5 million reduction in the amount owed to Deerfield.