Property and Equipment (Details Textuals)	12 Months Ended
	Dec. 31, 2014
Minimum [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Anticipated Timing of Inclusion of Costs in Amortization Calculation	5 years
Maximum [Member]
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items]
Anticipated Timing of Inclusion of Costs in Amortization Calculation	10 years