Investments in Affiliates (Tables)

9 Months Ended

Sep. 30, 2017

Related Party Transaction [Line Items]

Summary 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%

* See Note 14 for further details regarding the November 1, 2017 exercise of the Appalachia Warrant

Carbon California [Member]

Related Party Transaction [Line Items]

Schedule of selected historical financial data

(in thousands, except per share amounts)	Three Months Ended September 30, 2017			February 15, 2017 (Inception) through September 30, 2017
Revenues	$	1,994		$	6,511
Operating expenses		2,625			6,578
Loss from continuing operations		(1,135	)		(1,313	)
Net loss		(1,135	)		(1,313	)

Carbon Appalachia [Member]

Related Party Transaction [Line Items]

Schedule of selected historical financial data

(in thousands, except per share amounts)	Three Months Ended September 30, 2017			April 3, 2017 (Inception) through September 30, 2017
Revenues	$	1,348		$	2,905
Operating expenses		2,691			4,449
Loss from continuing operations		(1,545	)		(1,874	)
Net loss		(1,545	)		(1,874	)