Investments in Affiliates (Tables)

9 Months Ended

Sep. 30, 2018

Schedule of Equity Method Investments [Line Items]

Schedule of company's contributions

Date	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  September 30, 2018
Current assets	$	22,478
Total oil and gas properties, net	$	81,833
Total other property and equipment, net	$	15,880
Other long-term assets	$	1,302
Current liabilities	$	15,313
Non-current liabilities	$	61,234
Total members’ equity	$	44,946

	Three months ended		Three months ended
(in thousands)	September 30, 2018		September 30, 2017
Revenues	$	18,058	$	1,348
Operating expenses		16,686		2,691
Income (loss) from operations		1,372		(1,344	)
Net income (loss)	$	537	$	(1,546	)

	Nine months ended		April 3, 2017 to
(in thousands)	September 30, 2018		September 30, 2017
Revenues	$	62,480	$	2,905
Operating expenses		56,441		4,449
Income (loss) from operations		6,039		(1,544	)
Net income (loss)	$	4,017	$	(1,874	)