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Related Party Transactions (Details) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 18, 2007 USD ($) | Sep. 17, 2007 USD ($) item | Feb. 28, 2014 | Jan. 31, 2014 | Mar. 31, 2008 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | May. 15, 2014 USD ($)
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Cost incurred, development costs |  |  |  |  |  | $ 252,000 | $ 864,000 | $ 998,000 |
Working interest percent | 15.00% |  |  |  |  |  |  |  |
Bond, face value | $ 10,700,000 |  |  |  |  |  |  |  | $ 0
Cash collateral | $ 6,600,000 |  |  |  |  |  |  |  |
Percent of cash collateral |  |  |  |  |  | 100.00% |  |  |
Related parties accounts payable |  |  |  |  |  | $ 159,000 | 159,000 |  |
Allowance For Doubtful Accounts, Due from Related Parties, Current |  |  |  |  |  | 159,000 | 159,000 |  |
Accounts payable - related party |  |  |  |  |  | 634,000 | 590,000 |  |
Right-Of-Use And Easement Bonds [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Bond, face value |  |  |  |  |  | 1,550,000 |  |  |
Ten Well Program [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Wells in process of drilling | item |  | 10 |  |  |  |  |  |  |
Number of wildcat wells | item |  | 3 |  |  |  |  |  |  |
Number of developmental wells | item |  | 7 |  |  |  |  |  |  |
Percent of working interest revenue, as a fee |  |  | 85.00% | 25.00% |  |  |  |  |
Payout point multiplier | item |  | 1.35 |  |  |  |  |  |  |
Payout point value |  |  |  |  | $ 5,200,000 |  |  |  |
Related party transaction |  |  |  |  | $ 3,850,000 |  |  |  |
Ten Well Program [Member] | At Or Above Revenue Threshold [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Percent of working interest revenue, as a fee |  | 85.00% |  |  |  |  |  |  |
Ten Well Program [Member] | Up To Revenue Threshold [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Percent of working interest revenue, as a fee |  | 25.00% |  |  |  |  |  |  |
Ten Well Program [Member] | Producing Well [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Cost incurred, development costs |  | $ 400,000 |  |  |  |  |  |  |
Ten Well Program [Member] | Non-Productive Well [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Cost incurred, development costs |  | $ 250,000 |  |  |  |  |  |  |
Methane Project [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Percent of net profits, interest |  | 75.00% | 7.50% | 75.00% |  |  |  |  |
Hoactzin [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Allowance For Doubtful Accounts, Due from Related Parties, Current |  |  |  |  |  | $ 159,000 | $ 159,000 |  |

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