Asset Retirement Obligation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Changes in our asset retirement liability [Roll Forward]
Accretion expense	$ 924	$ 16,446
Liabilities settled-assets sold	34,471
North America [Member]
Changes in our asset retirement liability [Roll Forward]
Beginning balance	7,320	5,481
Accretion expense	552	1,839
Liabilities incurred from drilling	0	0
Liabilities settled-assets sold	0	0
Changes in estimates	0	0
Ending balance	7,872	7,320
South America [Member]
Changes in our asset retirement liability [Roll Forward]
Beginning balance	34,099	9,960
Accretion expense	372	14,607
Liabilities incurred from drilling	0	9,532
Liabilities settled-assets sold	(34,471)	0
Changes in estimates	0	0
Ending balance	$ 0	$ 34,099