Warrants	9 Months Ended
Sep. 30, 2013
Text Block [Abstract]
Warrants	9. WARRANTS In connection with a committed equity facility with Kingsbridge Capital Limited (“Kingsbridge”) in May 2009, the Company issued a 5-year warrant to Kingsbridge to purchase up to 200,000 shares of the Company’s common stock at an exercise price of $11.35 per share. These 200,000 warrants are outstanding at September 30, 2013 and expire on May 7, 2014. As discussed in detail in Note 1, on March 15, 2013 the Company executed loan documents with Hercules Technology Growth Capital Inc., a venture capital lender. In connection with the loan, Hercules received a warrant to purchase 693,202 shares of the Company’s common stock at an exercise price of approximately $1.12 per share. This warrant was issued April 26, 2013 and expires five years from the date of issuance. No warrants were exercised during the nine months ended September 30, 2013 and 2012, respectively.

9. WARRANTS

In connection with a committed equity facility with Kingsbridge Capital Limited (“Kingsbridge”) in May 2009, the Company issued a 5-year warrant to Kingsbridge to purchase up to 200,000 shares of the Company’s common stock at an exercise price of $11.35 per share. These 200,000 warrants are outstanding at September 30, 2013 and expire on May 7, 2014.

As discussed in detail in Note 1, on March 15, 2013 the Company executed loan documents with Hercules Technology Growth Capital Inc., a venture capital lender. In connection with the loan, Hercules received a warrant to purchase 693,202 shares of the Company’s common stock at an exercise price of approximately $1.12 per share. This warrant was issued April 26, 2013 and expires five years from the date of issuance.

No warrants were exercised during the nine months ended September 30, 2013 and 2012, respectively.