CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 202,277	$ 189,036
Operating expenses	155,275	147,908
Gross margin	47,002	41,128
Selling, general and administrative expenses	54,748	63,519
Restructuring and other related charges, net	0	16
Operating loss	(7,746)	(22,407)
Interest expense, net	(16,741)	(18,579)
Other income, net	635	3,179
Loss from continuing operations before income taxes	(23,852)	(37,807)
Provision for income taxes	(859)	(526)
Net loss from continuing operations	(24,711)	(38,333)
Discontinued operations:
Net income from discontinued operations, net of income tax	0	5,871
Net Income (Loss) Attributable to Parent, Total	$ (24,711)	$ (32,462)	[1]
Basic and diluted net loss per common share:
Loss from continuing operations, Basic (in USD per share)	$ (5.69)	$ (10.17)
Loss from continuing operations, diluted (in USD per share)	(5.69)	(10.17)
Income (loss) from discontinued operations, basic (in USD per share)	0	1.56
Income (loss) from discontinued operations, basic (in USD per share)	0	1.56
Basic (in dollars per share)	(5.69)	(8.61)
Diluted (in dollars per share)	$ (5.69)	$ (8.61)
Weighted-average number of shares outstanding:
Weighted-average number of basic shares outstanding (in shares)	4,344	3,770
Weighted-average number of diluted shares outstanding (in shares)	4,344	3,770

[1] Condensed consolidated statements of cash flows for the three months ended March 31, 2022 includes discontinued operations.