Additional Operations and Balance Sheet Information (Details 2) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Costs incurred in oil and gas property acquisitions, exploration and development:
Acquisition of properties	$ 214,000	$ 354,000	$ 3,629,000
Development costs	72,000	191,000	856,000
Total costs incurred	$ 286,000	$ 545,000	$ 4,485,000

Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 18
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447

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Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 235
-Section 50
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-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447

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Amount of costs incurred related to oil and gas property acquisition, exploration and development activities, including capitalized costs and costs charged to expense.

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