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Related Party Transactions (Narrative) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended | 106 Months Ended
--- | --- | --- | --- | ---
Dec. 18, 2007 | Dec. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 29, 2018
Related Party Transaction [Line Items] |  |  |  |  |
Working interest percent | 15.00% |  |  |  |
Related party allowance for doubtful accounts receivable |  | $ 0 | $ 0 | $ 14,000 |
Accounts receivable-related party, allowance for doubtful accounts |  | 0 | 0 | 159,000 |
Accounts receivable - related parties balance |  |  |  |  |
Other income |  |  | 159,000 |  |
Payments to acquire interest in the drilling program wells |  | 134,690 |  |  |
Methane Project [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Percent of net profits, interest |  |  |  | 7.50% |
Hoactzin Partners, L.P. [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related parties accounts payable |  |  |  | $ 159,000 |
Past due related parties accounts payable |  |  |  | 159,000 |
Accounts receivable-related party, allowance for doubtful accounts |  |  |  | 159,000 |
Hoactzin Partners, L.P. [Member] | Methane Project [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Net profits |  |  |  |  | $ 0
Related Party [Member] | Hoactzin Partners, L.P. [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts receivable - related parties balance |  | $ 0 | $ 0 | $ 159 |

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- Definition Amount for accounts payable to related parties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.17) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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