Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Summary of Net Income (Loss) Per Share

The following table summarizes the computation of basic and diluted net income (loss) per common share.

	Years Ended December 31,
	2021		2020		2019
Numerator:
Loss from continuing operations	$	(14,425)	$	(139,490)	$	(30,749)
Less: Preferred stock cumulative dividends and deemed dividends	(21,478)		(12,373)		(642)
Numerator for basic and diluted loss from continuing operations per common share (1)	(35,903)		(151,863)		(31,391)
Income (loss) from discontinued operations, net of tax (Note 2)	1,200		38,898		(15,992)
Numerator for basic and diluted undistributed net loss per common share (1)	$	(34,703)	$	(112,965)	$	(47,383)
Denominator:
Weighted average common shares outstanding	42,991		42,692		42,299
Adjustment for unvested restricted common stock	(461)		(493)		(269)
Adjustment for 2021 Warrants outstanding (2)	1,481		—		—
Shares used to calculate income (loss) per share, basic and diluted	44,011		42,199		42,030
Per common share net loss:
Basic loss from continuing operations per common share	$	(0.82)	$	(3.60)	$	(0.75)
Basic income (loss) from discontinued operations per common share	0.03		0.92		(0.38)
Basic net loss per common share	$	(0.79)	$	(2.68)	$	(1.13)
Diluted loss from continuing operations per common share	$	(0.82)	$	(3.60)	$	(0.75)
Diluted income (loss) from discontinued operations per common share	0.03		0.92		(0.38)
Diluted net loss per common share	$	(0.79)	$	(2.68)	$	(1.13)
Cash dividends declared per common share	$	—	$	—	$	0.21

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(1) Preferred Stock does not participate in losses.

(2) Weighted average 2021 Warrants outstanding are included in shares outstanding for calculation of basic earnings per share because they are exercisable at an exercise price of $0.01 per share, subject to certain adjustments (see Note 19).

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents potentially dilutive securities that were excluded from the calculation of diluted net income (loss) per common share because they had an anti-dilutive effect.

	Years Ended December 31,
	2021	2020	2019
Options	766	871	577
2019 Warrants	1,500	1,500	1,500
Series B Preferred Stock, as-converted	—	19,021	12,976
	2,266	21,392	15,053