Earnings per Share (Note)

9 Months Ended

Sep. 30, 2021

The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share data)	2021		2020		2021		2020
Numerator:
Net loss	$	(17,525)	$	(18,857)	$	(57,600)	$	(58,800)
Denominator:
Weighted average shares (basic)	44,386		43,347		44,318		43,251
Dilutive effect of potential common shares	—		—		—		—
Weighted average shares (diluted)	44,386		43,347		44,318		43,251
Basic loss per share	$	(0.39)	$	(0.44)	$	(1.30)	$	(1.36)
Diluted loss per share	$	(0.39)	$	(0.44)	$	(1.30)	$	(1.36)

Dilutive potential common shares consist of shares issuable upon the settlement of stock appreciation rights ("SARs"), and the vesting of restricted stock units ("RSUs") and market stock units ("MSUs"). Potential common shares determined to be antidilutive and excluded from diluted weighted average shares outstanding were approximately 1.1 million and 1.3 million for the three months ended September 30, 2021 and 2020, respectively, and 1.3 million for the nine months ended September 30, 2021 and 2020. In addition, potential common shares related to the convertible notes determined to be antidilutive and excluded from diluted weighted average shares outstanding were 5.8 million for the three and nine months ended September 30, 2021, and 2020.