DETAIL OF SELECTED BALANCE SHEET ACCOUNTS (Tables)

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of accounts receivable and allowance for doubtful accounts

Accounts receivable is comprised of the following:

	December 31,
	2016			2015
Current:
Accounts receivable	$	69,733		$	67,882
Less allowance for doubtful accounts	(12		)	—
Accounts receivable, net	$	69,721		$	67,882
Noncurrent:
Accounts receivable	37,984			—
Less allowance for doubtful accounts	—			—
Accounts receivable, net, noncurrent	37,984			—

Changes in the allowance for doubtful accounts were as follows: 

	Years Ended December 31,
	2016		2015
Beginning balance	$	—	$	—
Charges to expense	12		—
Write-offs	—		—
Ending balance	$	12	$	—

Schedule of prepaid expenses

Changes in deferred loan issuance costs and related accumulated amortization were as follows:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Balance at December 31, 2014	$	852	$	(48	)	$	804
Amortization expense	—		(283		)	(283		)
Balance at December 31, 2015	852		(331		)	521
Senior loan facility issuance costs	30,082		—			30,082
Amortization expense	—		(9,747		)	(9,747		)
Balance at December 31, 2016	$	30,934	$	(10,078	)	$	20,856

Prepaid expenses include the following: 

	December 31,
	2016		2015
Deposits	1,310		195
Other	667		692
Total prepaid expenses	$	1,977	$	887

Schedule of property and equipment

Property and equipment is comprised of the following: 

		December 31,
	Estimated Useful Life	2016			2015
Field operating equipment	3 – 10 years	$	80,780		$	100,001
Vehicles	3 – 5 years	15,905			16,041
Leasehold improvements	2 – 5 years	511			481
Software	3 – 5 years	2,081			1,906
Computer equipment	3 – 5 years	4,005			3,856
Office equipment	3 – 10 years	921			901
		104,203			123,186
Less: accumulated depreciation and amortization		(61,444		)	(61,358		)
Property and equipment, net		$	42,759		$	61,828

Schedule of goodwill

Changes in the carrying value of goodwill were as follows:  

Balance at December 31, 2014	$	1,977
Foreign currency translation adjustment	(319		)
Balance at December 31, 2015	1,658
Foreign currency translation adjustment	53
Balance at December 31, 2016	$	1,711

Schedule of carrying value of intangible assets

Changes in the carrying value of intangible assets and related accumulated amortization were as follows: 

	Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
Balance at December 31, 2014	$	1,491		$	(441	)	$	1,050
Amortization expense	—			(99		)	(99		)
Foreign currency translation adjustment	(162		)	—			(162		)
Balance at December 31, 2015	1,329			(540		)	789
Amortization expense	—			(95		)	(95		)
Foreign currency translation adjustment	27			—			27
Balance at December 31, 2016	$	1,356		$	(635	)	$	721

Schedule of future amortization expense of intangible assets

Future amortization expense is as follows: 

2017	$	94
2018	94
2019	94
2020	94
2021	94
Thereafter	251
Total	$	721

Schedule of deferred loan issuance costs

Changes in deferred loan issuance costs and related accumulated amortization were as follows:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Balance at December 31, 2014	$	852	$	(48	)	$	804
Amortization expense	—		(283		)	(283		)
Balance at December 31, 2015	852		(331		)	521
Senior loan facility issuance costs	30,082		—			30,082
Amortization expense	—		(9,747		)	(9,747		)
Balance at December 31, 2016	$	30,934	$	(10,078	)	$	20,856

Prepaid expenses include the following: 

	December 31,
	2016		2015
Deposits	1,310		195
Other	667		692
Total prepaid expenses	$	1,977	$	887

Schedule of accrued liabilities

Accrued liabilities include the following:

	December 31,
	2016		2015
Accrued payroll liabilities	$	7,432	$	5,794
Accrued interest	106		6,463
Other accrued liabilities	5,212		5,561
Total accrued liabilities	$	12,750	$	17,818