Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Summary of Reconciliation of the Denominator Used in the Calculation of Basic and Diluted Loss Per Share

A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except per share amounts):

	Three months ended September 30,						Nine months ended September 30,
	2019			2018			2019			2018
Numerator:
Net loss	$	(20,923	)	$	(11,472	)	$	(57,814	)	$	(35,878	)
Denominator:
Total weighted average common shares    outstanding—basic		37,250			34,895			36,585			33,934
Dilutive effect of share equivalents resulting from stock    options and restricted stock units		—			—			—			—
Weighted average common shares outstanding-diluted		37,250			34,895			36,585			33,934
Net loss per common share, basic and diluted	$	(0.56	)	$	(0.33	)	$	(1.58	)	$	(1.06	)

Summary of Shares Excluded from Calculation of Diluted Loss Per Share with a Potential Dilutive Impact

The following table contains share totals with a potentially dilutive impact (in thousands):

	As of September 30,
	2019		2018
Options to purchase common stock		866		1,378
Restricted stock units		2,747		1,611
Employee stock purchase plan		70		76
Total		3,683		3,065