CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ (DEFICIT) EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Issuance costs	$ 2,996
IPO \| Common Stock
Issuance costs	7,600
Series A convertible preferred stock
Issuance costs		$ 1
Series B convertible preferred stock
Issuance costs	$ 206	$ 152