Preferred Stock Warrants	9 Months Ended
Sep. 30, 2016
Text Block [Abstract]
Preferred Stock Warrants	9. Preferred Stock Warrants The Company classified its preferred stock warrants as liabilities. During the year ended December 31, 2015, $19.3 million of the fair value of the warrant liability was reclassified to redeemable convertible preferred stock and then into additional paid-in capital in stockholders’ equity (deficit) on conversion of redeemable convertible preferred stock into common stock on the closing of the IPO. The warrants were no longer outstanding at September 30, 2015. During the year ended December 31, 2015, 31,778 of the Series B-1 warrants were cash exercised at an exercise price of $7.45 per share, 412,508 of the Series B-1 warrants were cash exercised at an exercise price of $2.6075 per share and 37,385 of the Series C warrants were cash exercised at an exercise price of $5.215 per share, resulting in total aggregate cash proceeds to the Company of $1.5 million. On the closing of the Company’s IPO, all of the remaining outstanding preferred stock warrants were net exercised at the IPO price of $17.00 per share, which resulted in 6,499 shares of common stock being issued upon the net exercise of outstanding warrants to purchase 10,414 shares of Series B preferred stock, 291,164 shares of common stock being issued upon the net exercise of outstanding warrants to purchase 349,054 shares of Series B-1 preferred stock and 93,017 shares of common stock being issued upon the net exercise of outstanding warrants to purchase 134,180 shares of Series C preferred stock. During the nine months ended September 30, 2015, the Company remeasured the preferred stock warrants using the OPM and/or PWERM models, or based on the fair value of the underlying stock. On the closing of the IPO in July 2015, the outstanding preferred stock warrants were exercised and the liability on the preferred stock warrants was reclassified to additional paid-in capital in stockholders’ equity (deficit), and was no longer subject to remeasurement. The change in fair value of the preferred stock warrant liabilities is attributable to the increase of the fair value of the underlying stock. The change in the fair value of preferred stock warrants for the three and nine months ended September 30, 2015 is recognized as a component of other income (expense), net in the condensed consolidated statements of operations.

9. Preferred Stock Warrants

The Company classified its preferred stock warrants as liabilities. During the year ended December 31, 2015, $19.3 million of the fair value of the warrant liability was reclassified to redeemable convertible preferred stock and then into additional paid-in capital in stockholders’ equity (deficit) on conversion of redeemable convertible preferred stock into common stock on the closing of the IPO. The warrants were no longer outstanding at September 30, 2015.

During the year ended December 31, 2015, 31,778 of the Series B-1 warrants were cash exercised at an exercise price of $7.45 per share, 412,508 of the Series B-1 warrants were cash exercised at an exercise price of $2.6075 per share and 37,385 of the Series C warrants were cash exercised at an exercise price of $5.215 per share, resulting in total aggregate cash proceeds to the Company of $1.5 million.

On the closing of the Company’s IPO, all of the remaining outstanding preferred stock warrants were net exercised at the IPO price of $17.00 per share, which resulted in 6,499 shares of common stock being issued upon the net exercise of outstanding warrants to purchase 10,414 shares of Series B preferred stock, 291,164 shares of common stock being issued upon the net exercise of outstanding warrants to purchase 349,054 shares of Series B-1 preferred stock and 93,017 shares of common stock being issued upon the net exercise of outstanding warrants to purchase 134,180 shares of Series C preferred stock.

During the nine months ended September 30, 2015, the Company remeasured the preferred stock warrants using the OPM and/or PWERM models, or based on the fair value of the underlying stock. On the closing of the IPO in July 2015, the outstanding preferred stock warrants were exercised and the liability on the preferred stock warrants was reclassified to additional paid-in capital in stockholders’ equity (deficit), and was no longer subject to remeasurement.

The change in fair value of the preferred stock warrant liabilities is attributable to the increase of the fair value of the underlying stock. The change in the fair value of preferred stock warrants for the three and nine months ended September 30, 2015 is recognized as a component of other income (expense), net in the condensed consolidated statements of operations.