8.	Equity Financing

Public Offering Of Common Stock

On August 14, 2018, the Company entered into an underwriting agreement with Morgan Stanley & Co. LLC and Jefferies LLC, as representatives of several underwriters, or the “Underwriters”, in connection with the issuance and sale of 16,216,217 shares of the Company’s common stock at a public offering price of $9.25 per share. In addition, the Company granted the Underwriters a 30-day option to purchase up to 2,432,432 additional shares of common stock on the same terms, which the Underwriters exercised in full. The Company completed the offering on August 17, 2018 under which it received aggregate net proceeds of approximately $161.9 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company.

Direct Registered Offerings

In October 2017, the Company entered into securities purchase agreements pursuant to which it sold an aggregate of 8,382,643 shares of its common stock for total gross proceeds of $49.9 million, or the October 2017 Direct Registered Offering. The October 2017 Direct Registered Offering was closed on October 25, 2017.

In February 2018, the Company entered into a securities purchase agreement pursuant to which it sold (i) 4,090,000 shares of its common stock; (ii) 3,000,581 shares of its Series A convertible preferred stock and (iii) warrants to purchase 1,418,116 shares of its common stock, or the 2018 Offering Warrants, for total gross proceeds of $59.1 million, or the March 2018 Direct Registered Offering. The March 2018 Direct Registered Offering was closed on March 5, 2018. The 2018 Offering Warrants have an exercise price of $8.31 per share, became exercisable upon issuance and expire in March 2025.

Private Placements

In January 2017, the Company completed the closing of a private placement offering, or the 2017 Private Placement, through which it sold (i) 8,602,589 shares of its common stock and (ii) warrants that provide the warrant holders the right to purchase 1,720,512 shares of its common stock, or the 2017 Placement Warrants, and raised total gross proceeds of $26.1 million. The 2017 Placement Warrants have an exercise price of $3.17 per share, became exercisable in July 2017 and expire in January 2024.

At-The-Market Offering of Common Stock

In January 2017, the Company filed a shelf registration statement on Form S-3 with the SEC, which included a base prospectus covering the offering, issuance and sale of up to a maximum aggregate offering of $75.0 million of the Company’s common stock, preferred stock, debt securities, warrants, purchase contracts and/or units. In January and April 2017, the Company agreed to sell up to a cumulative $50.0 million of its common stock in accordance with the terms of a sales agreement with FBR Capital Markets & Co., pursuant to an at-the-market offering program in accordance with Rule 415(a)(4) under the Securities Act.

During the nine months ended September 30, 2018, the Company sold an aggregate of 33,097 shares of its common stock at an average market price of $8.41 per share, resulting in aggregate gross proceeds of approximately $0.3 million.