Segment Information (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Components of Segment Revenues and Adjusted EBITDA

Segment revenues and Adjusted EBITDA consisted of the following:

	Three Months Ended June 30,
	2021					2020
			Segment					Segment
	Segment		Adjusted			Segment		Adjusted
	Revenues		EBITDA			Revenues		EBITDA
Assessment, Permitting and Response	$	70,705	$	14,856		$	18,631	$	4,989
Measurement and Analysis		39,117		9,491			37,036		11,615
Remediation and Reuse		26,402		4,309			18,099		2,375
Total Operating Segments		136,224		28,656			73,766		18,979
Corporate and Other		—		(7,693	)		—		(5,084	)
Total	$	136,224	$	20,963		$	73,766	$	13,895
	Six Months Ended June 30,
	2021					2020
			Segment					Segment
	Segment		Adjusted			Segment		Adjusted
	Revenues		EBITDA			Revenues		EBITDA
Assessment, Permitting and Response	$	145,967	$	30,660		$	23,161	$	6,431
Measurement and Analysis		72,557		14,351			73,476		19,176
Remediation and Reuse		51,517		6,790			38,160		4,481
Total Operating Segments		270,041		51,801			134,797		30,088
Corporate and Other		—		(14,039	)		—		(10,640	)
Total	$	270,041	$	37,762		$	134,797	$	19,448

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

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

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2021			2020			2021			2020
Total	$	20,963		$	13,895		$	37,762		$	19,448
Interest expense, net		(6,798	)		(5,260	)		(9,486	)		(7,853	)
Income tax (expense) benefit		256			1,759			254			4,911
Depreciation and amortization		(10,905	)		(9,784	)		(21,674	)		(17,344	)
Stock-based compensation		(2,417	)		(1,140	)		(4,222	)		(2,290	)
Start-up losses and investment in new services		(1,123	)		(296	)		(2,090	)		(675	)
Acquisition costs		(506	)		(2,454	)		(743	)		(3,761	)
Fair value changes in financial instruments		(518	)		21,842			(1,120	)		(7,783	)
Fair value changes in business acquisitions contingent consideration		(12,971	)		(3,983	)		(24,035	)		(3,983	)
Short term purchase accounting fair value adjustment    to deferred revenue		—			—			—			(243	)
Initial public offering expense		—			—			—			(531	)
Discontinued services (i)		—			(1,078	)		—			(7,496	)
Expenses related to financing transactions		—			(277	)		(50	)		(277	)
Other losses or expenses		(464	)		—			(675	)		(147	)
Net (loss) income	$	(14,483	)	$	13,224		$	(26,079	)	$	(28,024	)

(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.