Commitments and Contingencies (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	May. 15, 2008
Long-term Purchase Commitment [Line Items]
Rent expense, including fees for operating expenses and consumption of electricity	$ 1.7	$ 0.9	$ 0.8
Payments for Construction in Process	7.0
Minimum outstanding commitments	$ 5.7
Royalty owner undivided interest in mineral				16.70%
Lease agreements [Member]
Long-term Purchase Commitment [Line Items]
Office space of headquarters | ft²	100,000
Term Of Old Contract Drilling Rig [Member]
Long-term Purchase Commitment [Line Items]
Term of new contract drilling rig	one year
Drilling Rig Commitments [Member]
Long-term Purchase Commitment [Line Items]
Maximum termination outstanding obligations of contracts	$ 43.5
Construction Contracts [Member]
Long-term Purchase Commitment [Line Items]
Maximum termination outstanding obligations of contracts	$ 28.5
Eagle Ford Acreage Agreement [Member]
Long-term Purchase Commitment [Line Items]
Effective date of which company entered into agreement	Sep. 01, 2012
Natural gas processing and transportation agreement	5 years
Minimum delivery commitment to avoid paying gas deficiency fee	80.00%
Transportation and processing fees under the agreement	$ 5.5	$ 5.8
Future undiscounted minimum payments	1.8
Future Undiscounted Minimum Payments, Due in Two Years	1.2
Loving County System Agreement [Member]
Long-term Purchase Commitment [Line Items]
Transportation and processing fees under the agreement	1.8
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate	$ 9.6