Basic earnings per share attributable to common stockholders is computed by dividing net income by the weighted average common shares outstanding during the period. Diluted earnings per share is calculated based on the combined weighted average number of common shares and potentially dilutive shares, which include the assumed exercise of employee stock options, unvested restricted stock awards, unvested restricted stock units and unvested performance stock units, including market-based performance units based on the expected achievement of performance targets. In computing diluted earnings per share, we utilize the treasury stock method.

A summary of the numerator and denominators used in the computation of earnings per share attributable to common stockholders follows:


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
Numerator:
Net income	$	5,208	$	7,006	$	398	$	2,889
Denominators:
Number of shares outstanding, end of period:
Class A common stock	62,502		57,145		62,502		57,145
Class B common stock	988		988		988		988


Effect of weighted average shares outstanding	(29)		(24)		(66)		(63)
Basic weighted average common shares outstanding	63,461		58,109		63,424		58,070
Impact of potentially dilutive securities:
Dilutive effect of stock options and other stock awards	102		90		100		91
Diluted weighted average common shares outstanding	63,563		58,199		63,524		58,161
Anti-dilutive potentially issuable shares	—		24		—		141