Net loss per share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share

The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect (in thousands):

	For the three and nine months ended
	September 30,
	2018		2017
Outstanding stock options		4,539		4,016
Restricted stock units		934		456
ESPP shares		10		10
		5,483		4,482