Property and Equipment (Details Textual)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($) Per_Mcfe	Jun. 30, 2015 USD ($) Per_Mcfe	Jun. 30, 2016 USD ($) Per_Mcfe	Jun. 30, 2015 USD ($) Per_Mcfe	Dec. 31, 2015 USD ($)
Property and Equipment (Textual)
Depletion expense related to unproved oil and gas properties			$ 3,100,000		$ 3,200,000
Capitalized general and administrative expenses			289,000	$ 289,000
Depletion expense related to oil and gas properties	$ 407,000	$ 661,000	$ 879,000	$ 1,300,000
Depletion expense related to oil and gas properties (in dollars per Mcfe) | Per_Mcfe	0.65	1.07	0.72	0.97
Depreciation and amortization expense	$ 29,000	$ 35,000	$ 59,000	$ 72,000