Weighted Average Shares Outstanding and Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Summary of Reconciliation of Weighted Average Shares Outstanding Used in Calculating Basic and Diluted Net loss Per Share

The following table presents a reconciliation of the weighted average shares outstanding used in calculating basic and diluted net loss per share as well as the calculation of basic and diluted net loss per share:

	Three Months Ended March 31,
(in thousands, except per share amounts)	2018			2017
Numerator (basic and diluted):
Net loss allocated to common shareholders for basic calculation	$	(11,423	)	$	(23,790	)
Denominator:
Weighted average common shares outstanding, basic		39,908			39,649
Dilutive effect of common stock options and restricted stock units1		—			—
Weighted average common shares outstanding, diluted		39,908			39,649
Net loss per share, basic	$	(0.29	)	$	(0.60	)
Net loss per share, diluted	$	(0.29	)	$	(0.60	)

 ¹Due to the net loss for the three months ended March 31, 2018 and 2017, restricted stock units and common stock options representing approximately 502,000 and 673,000, respectively, have been excluded from the number of shares used in calculating diluted net loss per share, as their inclusion would be antidilutive.