At-The-Market Offering	3 Months Ended
Mar. 31, 2015
At The Market Offering	8. At-The-Market Offering In May 2014, the Company entered into an At-the-Market Equity Offering Sales Agreement with Stifel, Nicolaus & Company, Incorporated, or Stifel, under which the Company is authorized to issue and sell shares of its common stock having aggregate sales proceeds of up to $75 million from time to time through Stifel, acting as sales agent and/or principal. The Company paid Stifel a commission of 2.0% of the gross proceeds from the sale of shares of our common stock under this facility. The offering is being conducted by the Company pursuant to a shelf registration statement previously filed with the Securities and Exchange Commission (Reg. No. 333-188227) and a related prospectus supplement. The Company intends to use the net proceeds from this facility to advance its development pipeline and for general corporate purposes, including working capital. As of March 31, 2015 the Company sold approximately 4.1 million shares of common stock under this facility, raising aggregate net proceeds of approximately $52.0 million. The Company sold approximately an additional 1.4 million shares of common stock under this facility subsequent to quarter-end through April 20, 2015 resulting in aggregate net proceeds of approximately $21.5 million. In April 2015, the Company entered into a new At-the-Market Equity Offering Sales Agreement with Stifel, under which the Company is authorized to issue and sell shares of its common stock having aggregate sales proceeds of up to $75 million from time to time through Stifel, acting as sales agent and/or principal. Sales of common stock under this facility will be made pursuant to an effective shelf registration statement previously filed with the Securities and Exchange Commission (Reg. No. 333-188227) and a related prospectus supplement. Please see Note 10 “Subsequent Events” for information regarding the new Sales Agreement.

8. At-The-Market Offering

In May 2014, the Company entered into an At-the-Market Equity Offering Sales Agreement with Stifel, Nicolaus & Company, Incorporated, or Stifel, under which the Company is authorized to issue and sell shares of its common stock having aggregate sales proceeds of up to $75 million from time to time through Stifel, acting as sales agent and/or principal. The Company paid Stifel a commission of 2.0% of the gross proceeds from the sale of shares of our common stock under this facility.

The offering is being conducted by the Company pursuant to a shelf registration statement previously filed with the Securities and Exchange Commission (Reg. No. 333-188227) and a related prospectus supplement. The Company intends to use the net proceeds from this facility to advance its development pipeline and for general corporate purposes, including working capital. As of March 31, 2015 the Company sold approximately 4.1 million shares of common stock under this facility, raising aggregate net proceeds of approximately $52.0 million. The Company sold approximately an additional 1.4 million shares of common stock under this facility subsequent to quarter-end through April 20, 2015 resulting in aggregate net proceeds of approximately $21.5 million.

In April 2015, the Company entered into a new At-the-Market Equity Offering Sales Agreement with Stifel, under which the Company is authorized to issue and sell shares of its common stock having aggregate sales proceeds of up to $75 million from time to time through Stifel, acting as sales agent and/or principal. Sales of common stock under this facility will be made pursuant to an effective shelf registration statement previously filed with the Securities and Exchange Commission (Reg. No. 333-188227) and a related prospectus supplement. Please see Note 10 “Subsequent Events” for information regarding the new Sales Agreement.