Investments in Affiliates (Tables)

6 Months Ended

Jun. 30, 2018

Schedule of Equity Method Investments [Line Items]

Schedule of company's contributions

Timing	Capital  Contribution	Resulting Class A  Units (%)			Resulting  Sharing %
April 2017	$0.24 million		2.00	%		2.98	%
August 2017	$3.71 million		15.20	%		16.04	%
September 2017	$2.92 million		18.55	%		19.37	%
November 2017	Warrant exercise		26.50	%		27.24	%

Schedule of selected historical unaudited financial data for Carbon Appalachia

(in thousands)	As of June 30, 2018
Current assets	$	21,475
Total oil and gas properties, net	$	83,541
Total other property and equipment, net	$	10,842
Other long-term assets	$	1,109
Current liabilities	$	14,531
Non-current liabilities	$	58,028
Total members’ equity	$	44,408

	Three months ended		April 3, 2017 to
(in thousands)	June 30,  2018		June 30,  2017
Revenues	$	18,679	$	1,557
Operating expenses		16,221		1,757
Income from operations		2,458		(200	)
Net income	$	1,853	$	(329	)

	Six months ended		April 3,  2017 to
(in thousands)	June 30,  2018		June 30,  2017
Revenues	$	44,422	$	1,557
Operating expenses		39,756		1,757
Income from operations		4,666		(200	)
Net income	$	3,479	$	(329	)