Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Net Loss Per Share

Computation of Basic and Diluted Loss Per Share Attributable to Common Stockholders

The following table sets forth the computation of net loss per common share (in thousands, except share and per share amounts):

	Year Ended December 31,
	2019		2018		2017
Numerator:
Net loss	$	(94,940)	$	(91,298)	$	(64,339)
Denominator:
Weighted average common shares outstanding - basic and diluted		64,478,066		56,219,919		47,435,331
Net loss per share - basic and diluted	$	(1.47)	$	(1.62)	$	(1.36)

Calculation of Anti-Dilutive Potentially Dilutive Securities Not Included in Diluted Per Share

	Year Ended December 31,
	2019	2018	2017
Options to purchase common stock	7,128,247	5,378,008	3,977,160
Warrants to purchase common stock	2,172,899	2,172,899	2,172,899
Restricted stock units	—	199,135	323,819
Performance-based restricted stock units	867,506	395,791	148,216
ESPP shares issuable	78,761	63,413	60,524
Total	10,247,413	8,209,246	6,682,618