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Convertible Preferred Stock	9 Months Ended
Convertible Preferred Stock	Sep. 30, 2015
Convertible Preferred Stock Disclosure
Convertible Preferred Stock	10. Convertible Preferred Stock At the closing of the IPO in July 2015, 31,397,221 shares of outstanding convertible preferred stock were automatically converted into common stock on a one-to-one basis. Following the IPO, there were no shares of preferred stock outstanding. In connection with the IPO, the Company amended and restated its Amended and Restated Certificate of Incorporation to change the authorized capital stock to 750.0 million shares designated as common stock and 50.0 million shares designated as preferred stock, all with a par value of $0.0001 per share.