Company Description - Additional Information (Details)	Sep. 30, 2014 Country License acre	Sep. 30, 2014 sqkm
Company description [Abstract]
Area of land held for exploration activities	10	43,000
Number of countries company operates in Africa	4	4
Number of exploration and production licenses	9	9

Fractional interest owned based on working interests or other economic arrangements of lease area on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas regardless of whether or not such area contains proved reserves.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 5

Name:	us-gaap_GasAndOilAreaUndevelopedNet
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant