Stockholders' Deficit (Notes)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Stockholders' Deficit

Stockholders’ Deficit

At-the-Market Equity Offering

In May 2016, the Company entered into an at-the-market (“ATM”) offering sales agreement with an investment bank pursuant to which the Company may offer and sell, from time to time at its sole discretion, shares of its common stock having an aggregate offering price of up to $25.0 million. During the three months ended September 30, 2017, the Company issued a total of 1,550,880 shares of its common stock under the ATM offering program. Net proceeds raised by the Company from the ATM offering amounted to approximately $19.4 million, after deducting $0.7 million of underwriting discounts and commissions and other offering expenses.