Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 sqft Contract acre	Dec. 31, 2011	Dec. 31, 2010	Aug. 01, 2012 acre	May 15, 2008
Commitments and Contingencies (Additional Textual) [Abstract]
Lease commencement date	Sep. 25, 2003
Lease expiration date	Jun. 30, 2011
Lease period		Jun. 30, 2022
Effective base rent per square foot per year	19.75
Rent expense, including fees for operating expenses and consumption of electricity	$ 0.6	$ 0.5	$ 0.4
Contract for the first rig was renegotiated period	March of 2013
Effective date of which company entered into agreement	Sep. 01, 2012
Natural gas processing and transportation agreement	5 years
Number of drilling rig contracts	2
Maximum termination outstanding obligations of contracts	5.1
Minimum delivery commitment to avoid paying gas deficiency fee	80.00%
Percentage of minimum delivery commitment to anticipated production	80.00%
Issue on the deep rights below the Cotton Valley formation	1,805
Right to participate in working capital	25.00%
Company's total revenue and overriding royalty interests on the acreage range Minimum	2.00%
Company's total revenue and overriding royalty interests on the acreage range Maximum	23.00%
Loss contingency, lawsuit filing date	May 15, 2008
Royalty owner undivided interest in mineral					0.167
Acres reformed by court				169
Rights on remaining acres				1,636
Contract One [Member]
Commitments and Contingencies (Textual) [Abstract]
Term of new contract drilling rig	365 days
Contract Two [Member]
Commitments and Contingencies (Textual) [Abstract]
Term of new contract drilling rig	270 days
Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Potential loss to the company	6
Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Potential loss to the company	0
Lease agreements [Member]
Commitments and Contingencies (Textual) [Abstract]
Transportation and processing fees under the agreement	$ 0.3
Lease agreements [Member] | Area of Land [Member]
Commitments and Contingencies (Textual) [Abstract]
Office space of headquarters	28,743