Net loss per share (Tables)

12 Months Ended

Dec. 31, 2018

Net loss per share

Schedule of potentially dilutive securities excluded in the computation of diluted net loss per share

	December 31,
	2018	2017	2016
Series C Redeemable Convertible Preferred Stock Warrants (as converted)	70,833	70,833	70,833
Stock options outstanding	3,446,885	2,454,973	2,107,344
RSUs granted, not released	75,314	85,000	—