Convertible Preferred Stock	12 Months Ended
Dec. 31, 2016
Equity [Abstract]
Convertible Preferred Stock	12. Convertible Preferred Stock In connection with the completion of the IPO in August 2014, all outstanding shares of Series A and Series B convertible preferred stock were converted into 10,689,027 shares of common stock on a one-for-one basis. In April 2014, the Company completed a Series B convertible preferred stock financing, pursuant to which then outstanding convertible notes were converted into 295,115 shares of Series B convertible preferred stock at a conversion price of $6.78, which was equal to 90% of the original issuance price of $7.53 per share. At the time of the conversion, the Company recorded a $0.2 million loss on extinguishment of related-party convertible notes in the consolidated statements of operations and comprehensive loss and a repurchase of beneficial conversion feature of $2.0 million as credit to additional paid-in capital. In April 2014, the Company repurchased 531,208 shares of Series A convertible preferred stock for $4.0 million. The difference between the repurchase price of $7.53 and original issuance price of $1.45 was recorded as a deemed dividend of $3.2 million to a preferred stockholder and effected the calculation of net loss attributable to common stockholders and net loss per share for the year ended December 31, 2014.

12. Convertible Preferred Stock

In connection with the completion of the IPO in August 2014, all outstanding shares of Series A and Series B convertible preferred stock were converted into 10,689,027 shares of common stock on a one-for-one basis.

In April 2014, the Company completed a Series B convertible preferred stock financing, pursuant to which then outstanding convertible notes were converted into 295,115 shares of Series B convertible preferred stock at a conversion price of $6.78, which was equal to 90% of the original issuance price of $7.53 per share. At the time of the conversion, the Company recorded a $0.2 million loss on extinguishment of related-party convertible notes in the consolidated statements of operations and comprehensive loss and a repurchase of beneficial conversion feature of $2.0 million as credit to additional paid-in capital.

In April 2014, the Company repurchased 531,208 shares of Series A convertible preferred stock for $4.0 million. The difference between the repurchase price of $7.53 and original issuance price of $1.45 was recorded as a deemed dividend of $3.2 million to a preferred stockholder and effected the calculation of net loss attributable to common stockholders and net loss per share for the year ended December 31, 2014.