Supplemental Information on Oil and Gas Exploration, Development and Production Activities (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash flows from sales of oil and gas			$ 31,125,778	$ 27,514,923
Future production cost			(7,611,052)	(6,628,886)
Future development cost			(4,758,170)	(4,758,170)
Future net cash flows			18,756,556	16,127,867
10% annual discount for timing of cash flow			(11,041,908)	(9,279,012)
Standardized measure of discounted future net cash flow relating to proved oil and gas reserves	$ 6,848,855	$ 6,848,855	7,717,658	6,848,855
Change due to current year operations Sales, net of production costs	1,465,985	(413,962)
Accretion of discount	684,886	16,413
Net change in sales and transfer price, net of production costs	1,656,330	197
Net change in future development cost		(4,758,170)
Discoveries		6,517,865
Revision and others	84,038	(57,247)
Changes in production rates and other	(93,476)	5,379,629
Net	865,793	6,684,725
Beginning of year	6,848,855	164,130
End of year	7,717,658	6,848,855
United States [Member]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash flows from sales of oil and gas			31,125,778	27,514,923
Future production cost			(7,611,052)	(6,628,886)
Future development cost			(4,758,170)	(4,758,170)
Future net cash flows			18,041,908	16,127,867
10% annual discount for timing of cash flow			(11,041,908)	(9,279,012)
Standardized measure of discounted future net cash flow relating to proved oil and gas reserves	6,848,855	6,848,855	7,714,648	6,848,855
Change due to current year operations Sales, net of production costs	1,465,985	(413,962)
Accretion of discount	684,886	16,413
Net change in sales and transfer price, net of production costs	1,656,330	197
Net change in future development cost		(4,758,170)
Discoveries		6,517,865
Revision and others	84,038	(57,247)
Changes in production rates and other	(93,476)	5,379,629
Net	865,793	6,684,725
Beginning of year	6,848,855	164,130
End of year	7,714,648	6,848,855
South America [Member]
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]
Future cash flows from sales of oil and gas
Future production cost
Future development cost
Future net cash flows
10% annual discount for timing of cash flow
Standardized measure of discounted future net cash flow relating to proved oil and gas reserves
Change due to current year operations Sales, net of production costs
Accretion of discount
Net change in sales and transfer price, net of production costs
Net change in future development cost
Discoveries
Revision and others
Changes in production rates and other
Net
Beginning of year
End of year