Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Series B redeemable convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Series B redeemable convertible preferred stock, shares authorized	9,357,935	9,357,935
Series B redeemable convertible preferred stock, shares issued	0	7,527,853
Series B redeemable convertible preferred stock, shares outstanding	0	7,527,853
Series B redeemable convertible preferred stock liquidation preference	$ 0	$ 13,383,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	670,000,000	670,000,000
Common stock, shares issued	16,488,120	5,883,503
Common stock, shares outstanding	16,488,120	5,883,503