Business Acquisitions - Additional Information (Details) - USD ($)	1 Months Ended							12 Months Ended
	Nov. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	Apr. 30, 2021	Jan. 31, 2021	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 31, 2021	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	Apr. 30, 2019	Mar. 31, 2019
Business Acquisition [Line Items]
Transaction costs related to business combinations								$ 2,100,000	$ 4,300,000	$ 2,400,000
Number of common stock shares issued in connection with business acquisition								178,721	791,139	150,439
Revenue										$ 23,200,000
Pre-tax income (loss)										2,400,000
Revenues from discontinued service lines								$ 0	$ 3,800,000	$ 18,400,000
Customer Relationships
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										9 years 6 months
Trade Names
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										1 year 6 months
Covenants Not to Compete
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										4 years
Proprietary Software
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										3 years
Patent
Business Acquisition [Line Items]
Weighted average useful lives for acquired intangible assets										16 years
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
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
MSE, Vista, Sensible and ECI | 2022 Earn Out
Business Acquisition [Line Items]
Business combination, earn-out payment, maximum								6,900,000
MSE, Vista, Sensible and ECI | 2025 Earn Out
Business Acquisition [Line Items]
Business combination, earn-out payment, maximum								$ 6,900,000
CTEH
Business Acquisition [Line Items]
Percentage of interests acquired							100.00%
Number of common stock shares issued in connection with business acquisition							791,139
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 payable in cash							100.00%
Golden
Business Acquisition [Line Items]
Percentage of interests acquired																100.00%
TES
Business Acquisition [Line Items]
Percentage of interests acquired															100.00%
TESUS
Business Acquisition [Line Items]
Percentage of interests acquired															100.00%
AWS
Business Acquisition [Line Items]
Percentage of interests acquired														100.00%
LEHDER
Business Acquisition [Line Items]
Percentage of interests acquired													100.00%
ECT2
Business Acquisition [Line Items]
Percentage of interests acquired												100.00%
Revenue										$ 11,300,000
Pre-tax income (loss)										$ 1,200,000