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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (FY) (Details) - USD ($) | Jun. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Income Taxes [Abstract] |  |  |
Net operating loss carryforwards |  | $ 9,119,000 | $ 9,675,000
Oil and gas properties |  | 1,054,000 | 1,327,000
Property, Plant and Equipment |  | (5,000) | (163,000)
Asset retirement obligation |  | 500,000 | 592,000
Tax credits |  | 65,000 | 130,000
Miscellaneous |  | 36,000 | 45,000
Valuation allowance |  | (10,704,000) | (11,476,000)
Net deferred tax asset | $ 0 | $ 65,000 | $ 130,000

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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