Subsequent Events (Tables)

12 Months Ended

Dec. 31, 2021

Subsequent Event [Line Items]

Summary of Elements of Purchase Price of Acquisitions

The following table summarizes the elements of purchase price of the acquisitions completed during 2020:

	Cash		Common Stock		Other Purchase Price Component Current			Other Purchase Price Component Long Term		Contingent Consideration Current		Contingent Consideration Long Term		Total Purchase Price
CTEH	$	175,000	$	25,000	$	(1,939	)	$	—	$	34,451	$	10,543	$	243,055
All other 2020 acquisitions		450		—		50			100		210		—		810
Total	$	175,450	$	25,000	$	(1,889	)	$	100	$	34,661	$	10,543	$	243,865

The following table summarizes the elements of purchase price of the 2019 acquisitions:

	Cash		Common Stock		Other Purchase Price Components			Contingent Consideration		Total Purchase Price
ECT2	$	54,037	$	—	$	(220	)	$	—	$	53,817
All other 2019 acquisitions		33,248		4,047		1,670			5,401		44,366
Total	$	87,285	$	4,047	$	1,450		$	5,401	$	98,183

ESI

Subsequent Event [Line Items]

Summary of Elements of Purchase Price of Acquisitions

The following table summarizes the elements of the purchase price of ESI:

	Cash (1)		Contingent Earnout (2)		Total Purchase Price
ESI	$	14,473	$	1,777	$	16,250

(1) The cash portion of this acquisition’s purchase price was funded through cash on hand.

(2) Represents a potential earnout amount, which is not finalized at this time.