8. Stockholders' Equity

        Immediately upon the closing of the IPO on April 2, 2014, the Company's certificate of incorporation was amended and restated to, among other things, authorize 200,000,000 shares of common stock and 5,000,000 shares of preferred stock.

        On September 30, 2015, the Company sold 3,625,000 shares of its common stock to the public, including 525,000 shares sold pursuant to the underwriters' over-allotment option. The Company received net proceeds of $117.1 million, which the Company intends to use for general corporate purposes.

        As of December 31, 2015, the Company was authorized to issue 205,000,000 total shares of capital stock, consisting of 200,000,000 shares of common stock and 5,000,000 shares of preferred stock. At December 31, 2015, the Company had reserved a total of 8,423,261 of its authorized shares of common stock for future issuance as follows: