Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Components of Segment Revenues and Adjusted EBITDA

Segment revenues and Adjusted EBITDA consisted of the following:

	Three Months Ended September 30,
	2021					2020
			Segment					Segment
	Segment		Adjusted			Segment		Adjusted
	Revenues		EBITDA			Revenues		EBITDA
Assessment, Permitting and Response	$	63,412	$	15,719		$	26,593	$	8,230
Measurement and Analysis		38,752		8,283			39,770		11,226
Remediation and Reuse		30,414		5,472			18,342		2,012
Total Operating Segments		132,578		29,474			84,705		21,468
Corporate and Other		—		(7,987	)		—		(4,762	)
Total	$	132,578	$	21,487		$	84,705	$	16,706
	Nine Months Ended September 30,
	2021					2020
			Segment					Segment
	Segment		Adjusted			Segment		Adjusted
	Revenues		EBITDA			Revenues		EBITDA
Assessment, Permitting and Response	$	209,379	$	46,379		$	49,768	$	14,665
Measurement and Analysis		111,309		22,634			113,130		30,422
Remediation and Reuse		81,931		12,262			56,604		6,495
Total Operating Segments		402,619		81,275			219,502		51,582
Corporate and Other		—		(22,026	)		—		(15,425	)
Total	$	402,619	$	59,249		$	219,502	$	36,157

Reconciliation of Segment Measure to Income (Loss) Before (Expense) Benefit from Income Taxes

Presented below is a reconciliation of the Company’s segment measure to income (loss) before (expense) benefit from income taxes:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2021			2020			2021			2020
Total	$	21,487		$	16,706		$	59,249		$	36,157
Interest expense, net		(1,722	)		(3,043	)		(11,208	)		(10,896	)
Income tax (expense) benefit		(902	)		(3,348	)		(648	)		1,563
Depreciation and amortization		(11,471	)		(9,740	)		(33,145	)		(27,084	)
Stock-based compensation		(2,365	)		(1,149	)		(6,587	)		(3,439	)
Start-up losses and investment in new services		(1,186	)		(602	)		(3,276	)		(1,283	)
Acquisition costs		(913	)		(6	)		(1,656	)		(3,767	)
Fair value changes in financial instruments		(531	)		(9,710	)		(1,651	)		(17,492	)
Fair value changes in business acquisitions contingent consideration		—			(13,404	)		(24,035	)		(17,387	)
Short term purchase accounting fair value adjustment    to deferred revenue		—			—			—			(243	)
Initial public offering expense and related bonuses		—			(6,378	)		—			(6,908	)
Discontinued services (i)		—			(30	)		—			(7,526	)
Expenses related to financing transactions		—			—			(50	)		(277	)
Other losses or expenses		(171	)		(33	)		(846	)		(179	)
Net income (loss)	$	2,226		$	(30,737	)	$	(23,853	)	$	(58,761	)

(i)During the first quarter of 2020, the Company determined to reduce the footprint of its environmental lab in Berkeley, California, and to exit its non-specialized municipal water engineering service line and its food waste biogas engineering service line. As a part of discontinuing service lines, the Company made the decision to book an additional bad debt reserve related to the uncertainty around the ability to collect on receivables related to these service lines (Note 3). It was determined that the discontinuation of these service lines did not represent a strategic shift that had (or will have) a major effect on the Company’s operations and financial results therefore did not meet the requirements to be classified as discontinued operations.