Common Stock	9 Months Ended
Sep. 30, 2017
Equity [Abstract]
Common Stock	8. Common Stock As of December 31, 2016, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue 143,500,000 shares of $0.001 par value common stock. On July 5, 2017, the Company increased the authorized number of shares of common stock to 150,000,000 shares. Each share of common stock entitles the holder to one vote on all matters submitted to a vote of the Company’s stockholders. Common stockholders are entitled to receive dividends, as may be declared by the Company’s board of directors, if any, subject to the preferential dividend rights of the preferred stock. As of September 30, 2017 and December 31, 2016, no dividends had been declared. As of September 30, 2017, the Company had reserved 3,113,310 shares for the exercise of outstanding stock options and grant of future awards under the Company’s stock incentive plans (see Note 9). As of December 31, 2016, the Company had reserved 12,206,216 shares for the conversion of outstanding shares of Redeemable Preferred Stock (see Note 6), the exercise of outstanding stock options and the number of shares remaining available for future grant under the Company’s stock incentive plans (see Note 9). Upon completion of the Company’s IPO on July 5, 2017, all shares of Redeemable Preferred Stock converted to common stock.

8. Common Stock

As of December 31, 2016, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue 143,500,000 shares of $0.001 par value common stock. On July 5, 2017, the Company increased the authorized number of shares of common stock to 150,000,000 shares.

Each share of common stock entitles the holder to one vote on all matters submitted to a vote of the Company’s stockholders. Common stockholders are entitled to receive dividends, as may be declared by the Company’s board of directors, if any, subject to the preferential dividend rights of the preferred stock. As of September 30, 2017 and December 31, 2016, no dividends had been declared.

As of September 30, 2017, the Company had reserved 3,113,310 shares for the exercise of outstanding stock options and grant of future awards under the Company’s stock incentive plans (see Note 9). As of December 31, 2016, the Company had reserved 12,206,216 shares for the conversion of outstanding shares of Redeemable Preferred Stock (see Note 6), the exercise of outstanding stock options and the number of shares remaining available for future grant under the Company’s stock incentive plans (see Note 9). Upon completion of the Company’s IPO on July 5, 2017, all shares of Redeemable Preferred Stock converted to common stock.