Net loss per share attributable to common stockholders (Tables)

9 Months Ended

Sep. 30, 2017

Net loss per share attributable to common stockholders

Schedule of computation of basic and diluted net loss per share attributable to common stockholders

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
	(in thousands)
Numerator:
Net loss attributable to common stockholders, basic and diluted	$	(3,450	)	$	(5,709	)	$	(18,347	)	$	(22,959	)
Denominator:
Weighted average common stock, basic and diluted	40,336			38,189			39,468			37,897
Net loss per share attributable to common stockholders:
Basic and diluted	$	(0.09	)	$	(0.15	)	$	(0.46	)	$	(0.61	)