Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share

Basic earnings per share excludes dilution and is computed by dividing net income by the weighted average number of common shares outstanding for the period, excluding unvested restricted common stock. Diluted earnings per share reflects the potential reduction in earnings per share that could occur if securities or other contracts to issue common stock were exercised or converted into common stock under the treasury stock method. Such securities or other contracts include unvested restricted stock awards, outstanding common stock options, convertible senior notes, and outstanding warrants, to the extent dilutive. In periods for which we report a net loss from continuing operations, diluted weighted average common shares outstanding excludes all potential common stock equivalents as their impact on diluted net loss from continuing operations per share would be anti-dilutive.

Earnings (loss) per share under the basic and diluted computations are as follows: 

	Year Ended December 31,
	2021		2020		2019
Net income (loss) from continuing operations	$	62,987	$	(23,718)	$	41,979
Loss from discontinued operations, net of tax	—		(122)		(236)
Net income (loss)	$	62,987	$	(23,840)	$	41,743
Weighted average common shares outstanding—basic	21,439		21,882		21,993
Weighted average common stock equivalents	370		—		514
Weighted average common shares outstanding—diluted	21,809		21,882		22,507
Net earnings (loss) per basic share:
Net income (loss) from continuing operations	$	2.94	$	(1.08)	$	1.91
Loss from discontinued operations, net of tax	—		(0.01)		(0.01)
Net income (loss)	$	2.94	$	(1.09)	$	1.90
Net earnings (loss) per diluted share:
Net income (loss) from continuing operations	$	2.89	$	(1.08)	$	1.87
Loss from discontinued operations, net of tax	—		(0.01)		(0.02)
Net income (loss)	$	2.89	$	(1.09)	$	1.85

Summary of Anti-dilutive Securities Excluded from Computation of Weighted Average Common Stock Equivalents

The number of anti-dilutive securities excluded from the computation of the weighted average common stock equivalents presented above at December 31, 2021 and 2020 were 0.1 million and 1.1 million, respectively, and related to unvested restricted stock. The number of anti-dilutive securities excluded from the computation of the weighted average common stock equivalents presented above at December 31, 2019 were 3.1 million and related to the warrants sold in conjunction with the issuance of our convertible senior notes.

As of December 31,