Net loss per share attributable to common stockholders (Tables)

9 Months Ended

Sep. 30, 2015

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,
	2015			2014			2015			2014
	(in thousands)
Numerator:
Net loss attributable to common stockholders, basic and diluted	$	(4,819	)	$	(3,815	)	$	(18,638	)	$	(12,997	)
Denominator:
Weighted average common stock, basic and diluted	37,041			35,881			36,722			35,619
Net loss per share attributable to common stockholders:
Basic and diluted	$	(0.13	)	$	(0.11	)	$	(0.51	)	$	(0.36	)