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Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Business Segment Information [Abstract]

Summary of operating results for the business segments

(in thousands)		GRE				Afek				GOGAS				Corporate				Total
Three Months Ended September 30, 2018
Revenues		$	71,672			$	—			$	170			$	—			$	71,842
Income (loss) from operations			9,208				(54	)			(1,062	)			(2,046	)			6,046
Write-down of assets held for sale to fair value			—				—				451				—				451
Exploration			—				—				—				—				—
Equity in the net loss of equity method investee			767				—				94				—				861
Three Months Ended September 30, 2017
Revenues		$	69,473			$	—			$	—			$	—			$	69,473
Income (loss) from operations			4,773				(1,011	)			(158	)			(2,201	)			1,403
Exploration			—				753				—				—				753
Equity in net loss of Shoreditch			159				—				—				—				159
Nine Months Ended September 30, 2018
Revenues		$	217,373			$	—			$	171			$	—			$	217,544
Income (loss) from operations			22,826				(541	)			(5,307	)			(6,624	)			10,354
Write-down of assets held for sale to fair value			—				—				2,742				—				2,742
Exploration			—				244				—				—				244
Equity in the net loss of joint venture			1,988				—				94				—				2,082
Nine Months Ended September 30, 2017
Revenues		$	191,126			$	—			$	—			$	—			$	191,126
Income (loss) from operations			4,352				(3,611	)			(350	)			(7,359	)			(6,968	)
Exploration			—				2,256				—				—				2,256
Equity in net loss of Shoreditch			159				—				—				—				159

Summary of total assets for the business segments

(in thousands)		GRE				Afek				GOGAS				Corporate				Total
Total assets:
September 30, 2018		$	122,992			$	1,228			$	4,516			$	2,727			$	131,463
December 31, 2017			112,521				2,588			$	7,887				2,782				125,778

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- Definition

Tabular disclosure of all significant reconciling items in the reconciliation of total assets from reportable segments to the entity's consolidated assets.

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