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Information Regarding Proved Oil and Gas Reserves (Details 1) Mcf in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Mcf	Dec. 31, 2016 USD ($) Mcf	Dec. 31, 2015 USD ($) Mcf	Dec. 31, 2014 USD ($)
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Discounted future net cash flows	$ 216,393	$ 141,427	$ 39,797	$ 162,437
Company
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Proved Developed and Undeveloped Reserves, Net, Period Increase (Decrease) | Mcf	(22,095)	213,813	76,475
Future net cash flows	$ 1,802	$ 1,154	$ 690
Production	902	713	345
Development and abandonment	0	2	25
Income taxes	0	0	0
Future net cash flows	900	439	320
10% discount factor	(328)	(154)	(128)
Discounted future net cash flows	$ 572	$ 285	$ 192	1,766
Company's Share of Laramie Energy
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Proved Developed and Undeveloped Reserves, Net, Period Increase (Decrease) | Mcf	(22,178)	200,045	101,553
Future net cash flows	$ 1,026,005	$ 905,607	$ 405,365
Production	491,748	462,684	238,129
Development and abandonment	109,248	136,224	67,443
Income taxes	0	0	0
Future net cash flows	425,009	306,699	99,793
10% discount factor	(209,188)	(165,557)	(60,188)
Discounted future net cash flows	$ 215,821	141,142	39,605	$ 160,671
Restatement Adjustment | Company's Share of Laramie Energy
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future net cash flows		$ 1,800	$ 400
Future cash flow estimate revision percentage		1.00%	1.00%
Laramie [Member] | Company
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Proved Developed and Undeveloped Reserves, Net, Period Increase (Decrease) | Mcf	(30)

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Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of proved oil and gas reserves.

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Amount, after future accumulated cash outflow for development and production costs and future income tax, of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for costs to be incurred in producing proved oil and gas reserves.

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Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of ten percent a year.

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