Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Aug. 31, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015
Preferred stock, par value			$ 0.001	$ 0.001
Common stock, par value			0.0001	0.0001
Series A Convertible Preferred Stock [Member]
Preferred stock, par value			0.001	0.001
Convertible Preferred Stock [Member]
Preferred stock, par value			$ 0.001	$ 0.001
Series C-1 [Member]
Issuance of Series C-1 convertible preferred stock, net of issuance costs	$ 200	$ 200
Offering costs			$ 7,186