Supplemental Information on Oil and Gas Exploration, Development and Production Activities (Unaudited) - Capitalized Costs and Accumulated Depletion Relating to Oil and Gas Producing Activities (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items]
Unproved properties not being amortized	$ 2,456,499	$ 2,309,341
Proved properties being amortized	60,284,542
Accumulated depreciation, depletion, amortization and impairment	(55,992,898)	(55,635,076)
Net capitalized costs	6,861,479
United States [Member]
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items]
Unproved properties not being amortized	135,329
Proved properties being amortized	10,943,176
Accumulated depreciation, depletion, amortization and impairment	(6,538,196)	(6,180,374)
Net capitalized costs	4,540,309
South America [Member]
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items]
Unproved properties not being amortized	2,321,170	2,309,341
Proved properties being amortized	49,454,702
Accumulated depreciation, depletion, amortization and impairment	(49,454,702)	$ (49,454,702)
Net capitalized costs	$ 2,321,170