Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016
Line of Credit Facility [Line Items]
Amortization of deferred financing costs	$ 219	$ 231		$ 750		$ 465
Interest Expense	2,863	1,270	[1]	8,760	[2]	2,855	[1]
Provider Earnout
Line of Credit Facility [Line Items]
Accretion of contingent earnout consideration (included within interest expense)	0			100
Major Earnout
Line of Credit Facility [Line Items]
Accretion of contingent earnout consideration (included within interest expense)	1,000			3,600
Verde Earnout
Line of Credit Facility [Line Items]
Accretion of contingent earnout consideration (included within interest expense)	100			100
Convertible Subordinated Notes
Line of Credit Facility [Line Items]
Interest incurred on convertible subordinated notes to affiliate	0	132		1,052		385
Amortization of discount		100				100
Subordinated Debt
Line of Credit Facility [Line Items]
Interest incurred on Senior Credit Facility	153	0		161		0
Promissory Note
Line of Credit Facility [Line Items]
Interest incurred on Senior Credit Facility	162	0		162		0
Working Capital Facility
Line of Credit Facility [Line Items]
Letters of credit fees and commitment fees	214	195		632		570
Working Capital Facility | Senior Credit Facility
Line of Credit Facility [Line Items]
Interest incurred on Senior Credit Facility	988	712		2,216		1,435
Level 3 | Fair Value, Measurements, Recurring
Line of Credit Facility [Line Items]
Accretion of contingent earnout consideration (included within interest expense)	$ 1,127	$ 0		3,787		$ 0
Level 3 | Fair Value, Measurements, Recurring | Provider Earnout
Line of Credit Facility [Line Items]
Accretion of contingent earnout consideration (included within interest expense)				107
Level 3 | Fair Value, Measurements, Recurring | Verde Earnout
Line of Credit Facility [Line Items]
Accretion of contingent earnout consideration (included within interest expense)				$ 78

[1] Financial information has been recast to include results attributable to the acquisition of the Major Energy Companies by an affiliate on April 15, 2016. See Note 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.

[2] Financial information has been recast to include results attributable to the acquisition of Perigee Energy, LLC by an affiliate on February 3, 2017. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.