Business Acquisitions - Additional Information (Details) - USD ($)	1 Months Ended								12 Months Ended
	Mar. 31, 2022	Nov. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	Apr. 30, 2021	Jan. 31, 2021	Apr. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2022	Sep. 30, 2022	Aug. 31, 2022	Jan. 31, 2022	Oct. 31, 2021
Business Acquisition [Line Items]
Transaction costs related to business combinations									$ 1,891,000	$ 2,088,000	$ 4,344,000
Number of common stock shares issued in connection with business acquisition										178,721	791,139
Business combination, paid in cash									29,744,000	$ 59,486,000	$ 175,450,000
Revenues from discontinued service lines and discontinued O&M contracts									3,600,000	12,100,000	17,100,000
Environmental Standards and IAG | 2026 Earn Out
Business Acquisition [Line Items]
Business combination, earn-out payment, maximum									9,500,000
Business combination, paid in cash									4,000,000.0
Environmental Standards
Business Acquisition [Line Items]
Percentage of interests acquired															100.00%
Business combination, paid in cash									$ 14,473,000
Environmental Standards | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets									7 years
Environmental Standards | Trade Names
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets									2 years
Environmental Standards | Covenants Not to Compete
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets									5 years
TriAD
Business Acquisition [Line Items]
Percentage of interests acquired														100.00%
AirKinetics
Business Acquisition [Line Items]
Percentage of interests acquired													100.00%
Huco
Business Acquisition [Line Items]
Percentage of interests acquired												100.00%
MSE Group, LLC
Business Acquisition [Line Items]
Percentage of interests acquired							100.00%
Number of common stock shares issued in connection with business acquisition							71,740
Vista
Business Acquisition [Line Items]
Percentage of interests acquired					100.00%
Number of common stock shares issued in connection with business acquisition					9,322
EI
Business Acquisition [Line Items]
Percentage of interests acquired				100.00%
Number of common stock shares issued in connection with business acquisition				43,100
Business combination, paid in cash										$ 20,721,000
EI | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										10 years
EI | Trade Names
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										5 years
EI | Covenants Not to Compete
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										5 years
Sensible
Business Acquisition [Line Items]
Percentage of interests acquired			100.00%
Number of common stock shares issued in connection with business acquisition			19,638
ECI
Business Acquisition [Line Items]
Percentage of interests acquired																100.00%
Horizon
Business Acquisition [Line Items]
Percentage of interests acquired		100.00%
Number of common stock shares issued in connection with business acquisition		34,921
MSE, Vista, Sensible and ECI
Business Acquisition [Line Items]
Revenue										$ 33,700,000
Pre-tax income (loss)										$ 800,000
CTEH
Business Acquisition [Line Items]
Percentage of interests acquired								100.00%
Number of common stock shares issued in connection with business acquisition								791,139
Business combination, paid in cash											175,000,000
Revenue											82,400,000
Pre-tax income (loss)											11,700,000
CTEH | External Proprietary Software
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets								5 years
CTEH | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets								15 years
CTEH | Trade Names
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets								5 years
CTEH | Covenants Not to Compete
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets								5 years
CTEH | Proprietary Software
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets								3 years
CTEH | Covenants Not to Compete Other Acquisitions
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets								4 years
CTEH | 2020 Earn Out
Business Acquisition [Line Items]
Business combination, earn-out payment, maximum											50,000,000.0
Business combination, contingent consideration arrangements, basis for amount									CTEH first year earnout was calculated at twelve times CTEH’s 2020 EBITDA (as defined in the purchase agreement) in excess of $18.3 million, with a maximum first year earn-out payment of $50.0 million, which was fully achieved.
Business combination, contingent consideration arrangements, description									The 2020 earn out was initially payable 100.0% in common stock, but as a result of the completion of the Company’s IPO (Note 1), at the Company’s election, 50.0% was payable in cash.
Business combination, minimum EBITDA for contingent consideration arrangements											$ 18,300,000
Percentage of earn out payable in common stock											100.00%
Percentage of earn out payable in cash, as result of completing of IPO											50.00%
Percentage of earn out paid in cash, as result of completing of IPO						50.00%
Percentage of earn out paid in common stock, as a result of completion of IPO						50.00%
CTEH | 2020 Earn Out | Minimum
Business Acquisition [Line Items]
Business combination, actual EBITDA											$ 18,300,000
CTEH | 2020 Earn Out | Maximum
Business Acquisition [Line Items]
Business combination, actual EBITDA											22,500,000
CTEH | 2021 Earn Out
Business Acquisition [Line Items]
Business combination, earn-out payment, maximum											$ 30,000,000.0
Business combination, contingent consideration arrangements, basis for amount									The second year earn-out was calculated at ten times CTEH’s 2021 EBITDA in excess of actual 2020 EBITDA (with actual 2020 EBITDA subject to a minimum of $18.3 million and a maximum of $22.5 million), with a maximum second year earn-out payment of $30.0 million, which was fully achieved.
Percentage of earn out paid in cash	100.00%
EnvStd, Huco, IAG, TriAD and AirKinetics
Business Acquisition [Line Items]
Revenue									$ 20,200,000
Pre-tax income (loss)									$ 2,900,000