7.	Equity Offering

On July 28, 2016, the Company filed a prospectus supplement and associated sales agreement related to an at-the-market (“ATM”) equity offering program pursuant to which the Company may sell, from time to time, common stock having an aggregate offering price of up to $75,000 through Cowen and Company LLC, as sales agent, for general corporate purposes. No sales occurred during the third quarter 2018. During the nine months ended September 30, 2018, the Company sold a total of 300,227 shares of its common stock under the ATM program for $2,914, or an average of $9.71 per share, and received proceeds of $2,849, net of commissions of $65. As of September 30, 2018, the Company had sold a total of 3,705,936 shares of its common stock under the ATM program for $49,527, or an average of $13.36 per share, and received proceeds of $48,412, net of commissions of $1,114.