PROPERTY AND EQUIPMENT

12 Months Ended

Dec. 31, 2019

Property Plant And Equipment [Abstract]

Property and Equipment

NOTE 5.  PROPERTY AND EQUIPMENT

Property and equipment is comprised of the following at December 31:

	Estimated Useful Life	2019			2018
Field operating equipment	3 – 10 years	$	102,003		$	89,962
Transportation equipment	3 – 5 years		18,289			18,353
Leasehold improvements	2 – 5 years		563			461
Software	3 – 5 years		2,003			1,976
Computer equipment	3 – 5 years		5,651			5,584
Office equipment	3 – 10 years		984			902
			129,493			117,238
Accumulated depreciation and amortization			(92,204	)		(81,904	)
Property and equipment, net		$	37,289		$	35,334

Depreciation expense relating to property and equipment was $11.3 million and $11.4 million in 2019 and 2018, respectively, of which $0.3 million in both 2019 and 2018 is included in “Selling, general and administrative expenses” on our consolidated statements of operations.