EARNINGS PER SHARE

Basic earnings per share is computed by dividing the net loss by the weighted average number of 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, including market-based performance stock options based on the expected achievement of performance targets, 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 follows:



	Three Months Ended March 31,
	2019			2018
Numerator:
Net loss	$	(1,714	)	$	(3,910	)
Denominators:
Number of shares outstanding, end of period:
Class A common stock	46,252			41,700
Class B common stock	988			988
Shares to be issued - acquisition	36			—
Unvested restricted stock	(9		)	(38		)
Effect of weighted average shares outstanding	(1,354		)	(280		)
Basic and diluted weighted average common shares outstanding	45,913			42,370
Anti-dilutive potentially issuable shares	1,422			2,105