For the periods presented, the following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net earnings (loss) per share (in thousands, except per share amounts):


	Three months ended March 31,
	2024		2023
Numerator:
Net income (loss)	$	33,344	$	(4,358	)
Interest add back		1,216		—
Net income (loss) attributable to common stockholders	$	34,560	$	(4,358	)
Denominator:
Weighted average common shares outstanding, basic		27,357		26,285
Dilutive effect of:
Stock plans		1,479		—
2021 Notes		2,589		—
Weighted average common shares outstanding, diluted		31,425		26,285

Net earnings (loss) per share — basic	$	1.22	$	(0.17	)
Net earnings (loss) per share — diluted	$	1.10	$	(0.17	)

Basic net earnings (loss) per share is calculated using our net income (loss) and our weighted average outstanding common shares.

Diluted net earnings (loss) per share is calculated using our net income (loss) attributable to common stockholders with interest charges applicable to our convertible debt added back under the if converted method and our weighted average outstanding common shares including the dilutive effect of stock awards and employee stock purchase plan shares as determined under the treasury stock method and of our convertible notes using the if converted method. In periods when we recognize a net loss, we exclude the impact of outstanding stock awards and the potential share settlement impact related to our convertible notes from the diluted loss per share calculation as their inclusion would have an antidilutive effect.

The following table presents the outstanding shares of our common stock equivalents excluded from the computation of diluted net earnings (loss) per share as of the dates presented because their effect would have been antidilutive (in thousands):


	Three months ended March 31,
	2024		2023
Stock options		—		1,600
RSUs, MSUs and PSUs		878		1,551
Employee stock purchase plan shares		18		16
2021 Notes		—		2,589