Earnings Per Share Attributable to Common Stockholders

3 Months Ended

Mar. 31, 2021

Earnings Per Share Attributable to Common Stockholders

12. Earnings Per Share Attributable to Common Stockholders

Basic earnings per share is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the period without consideration for common stock equivalents. Diluted net income per share attributable to common stockholders is computed by dividing net income by the weighted-average number of common shares outstanding during the period and potentially dilutive common stock equivalents, including stock options and restricted stock units, except in cases where the effect of the common stock equivalent would be antidilutive. Potential common stock equivalents consist of common stock issuable upon exercise of stock options and vesting of restricted stock units using the treasury stock method. For periods of net loss, basic and diluted earnings per share are the same as the effect of the assumed exercise of stock options and vesting of restricted stock units is anti-dilutive.

The following table presents the calculation of basic and diluted net loss per share attributable to common stockholders for the three months ended March 31, 2021 and 2020:

	Three Months Ended March 31,
	2021			2020
	(in thousands, except per share data)
Basic loss per share:
Net loss attributable to common stockholders (numerator)	$	(75,461	)	$	(33,427	)
Shares used in computation (denominator)
Weighted-average common shares outstanding		93,215			91,793
Basic loss per share	$	(0.81	)	$	(0.36	)
Diluted loss per share:
Net loss attributable to common stockholders (numerator)	$	(75,461	)	$	(33,427	)
Shares used in computation (denominator)
Weighted-average common shares outstanding		93,215			91,793
Effect of dilutive securities:
Stock options		—			—
Restricted stock units		—			—
Weighted-average diluted shares		93,215			91,793
Diluted loss per share	$	(0.81	)	$	(0.36	)

The number of shares of common stock underlying stock-based awards excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been antidilutive for the three months ended March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Anti-dilutive shares underlying stock-based awards:
Stock options		2,492		2,908
Restricted stock units		4,041		4,403