Property and Equipment (Details Textual)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017 USD ($) Per_Mcfe	Jun. 30, 2016 USD ($) Per_Mcfe	Jun. 30, 2017 USD ($) Per_Mcfe	Jun. 30, 2016 USD ($) Per_Mcfe	Dec. 31, 2016 USD ($)
Property and Equipment (Textual)
Capitalized general and administrative expenses			$ 131,000	$ 289,000
Depletion expense related to oil and gas properties	$ 539,000	$ 407,000	$ 1,100,000	$ 879,000
Depletion expense related to oil and gas properties (in dollars per Mcfe) | Per_Mcfe	0.40	0.65	0.41	0.72
Depreciation and amortization expense	$ 123,000	$ 29,000	$ 163,000	$ 59,000
Amortized capital cost, description			Within five years.
Unproved properties not subject to depletion [Member]
Property and Equipment (Textual)
Depletion expense related to unproved oil and gas properties			$ 1,900,000		$ 2,000,000