Net loss per share attributable to common stockholders (Tables)

9 Months Ended

Sep. 30, 2016

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,
	2016			2015			2016			2015
	(in thousands)
Numerator:
Net loss attributable to common stockholders, basic and diluted	$	(5,709	)	$	(4,819	)	$	(22,959	)	$	(18,638	)
Denominator:
Weighted average common stock, basic and diluted	38,189			37,041			37,897			36,722
Net loss per share attributable to common stockholders:
Basic and diluted	$	(0.15	)	$	(0.13	)	$	(0.61	)	$	(0.51	)