Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Components of Segment Revenues and Adjusted EBITDA

Segment revenues and Adjusted EBITDA consisted of the following:

	Three Months Ended March 31,
	2022					2021
			Segment					Segment
	Segment		Adjusted			Segment		Adjusted
	Revenues		EBITDA			Revenues		EBITDA
Assessment, Permitting and Response	$	45,600	$	9,623		$	75,262	$	15,804
Measurement and Analysis		39,761		6,322			33,440		4,860
Remediation and Reuse		49,319		7,993			25,115		2,481
Total Operating Segments		134,680		23,938			133,817		23,145
Corporate and Other		—		(7,487	)		—		(6,345	)
Total	$	134,680	$	16,451		$	133,817	$	16,800

Reconciliation of Segment Measure to Net Loss

Presented below is a reconciliation of the Company’s segment measure to net loss:

	For the Three Months Ended March 31,
	2022			2021
Total	$	16,451		$	16,800
Interest expense, net		(1,092	)		(2,688	)
Income tax expense		(1,269	)		(2	)
Depreciation and amortization		(12,144	)		(11,796	)
Stock-based compensation		(10,425	)		(1,805	)
Start-up losses and investment in new services		(786	)		(968	)
Acquisition costs		(467	)		(237	)
Fair value changes in financial instruments		2,449			(602	)
Fair value changes in business acquisitions contingent consideration		21			(11,064	)
Expenses related to financing transactions		(7	)		(50	)
Other losses or expenses		(267	)		(519	)
Net loss	$	(7,536	)	$	(12,931	)