15. Subsequent Events

On February 4, 2020, the Company completed an underwritten public offering of 18,965,385 shares of its common stock, which includes the full exercise of the underwriters’ option to purchase additional shares of common stock, and pre-funded warrants to purchase 2,884,615 shares of its common stock. The public offering price of the common stock was $2.60 per share and the public offering price of each pre-funded warrant was $2.599 per underlying share. The net proceeds from the public offering were approximately $53.3 million, after deducting underwriting discounts and commissions and other offering expenses paid by the Company. The Company’s existing stockholder, Morningside Ventures, together with its affiliate, and certain of the Company’s officers and directors purchased an aggregate amount of approximately $22.9 million of common stock in the offering.