Net income (loss) per share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted net income per share

The following table sets forth the computation of the basic and diluted net income (loss) per share for the periods indicated (in thousands, except per share amounts): 

	Three Months Ended September 30,					Nine Months Ended September 30,
	2019		2018			2019			2018
Numerator:
Net income (loss)	$	2,272	$	(8,125	)	$	(19,145	)	$	(36,908	)
Denominator:
Weighted average shares used to compute per share amount:
Basic	47,666		45,476			46,949			44,804
Diluted	48,615		45,476			46,949			44,804
Basic net income (loss) per share	$	0.05	$	(0.18	)	$	(0.41	)	$	(0.82	)
Diluted net income (loss) per share	$	0.05	$	(0.18	)	$	(0.41	)	$	(0.82	)

Schedule of potentially dilutive securities excluded from computation of diluted net income per share attributable to common stockholders

The Company has excluded the impact of the following outstanding employee stock options and restricted stock units as well as the shares expected to be issued under its employee stock purchase plan from the computation of diluted net income (loss) per share, as their effect would have been antidilutive (in thousands): 

	Three Months Ended September 30,		Nine Months Ended September 30,
	2019	2018	2019	2018
Employee stock options	1,217	3,405	2,833	3,405
Restricted stock units	1,037	2,630	3,208	2,630
Market-based restricted stock units	641	665	641	665
Employee stock purchase plan	172	174	182	174
	3,067	6,874	6,864	6,874