| **Business Combination Business Combination (Details) $ / shares in Units, a in Thousands, $ in Thousands**                             | 3 Months Ended | 9 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Business Acquisition [Line Items]**                                                                                                   |           |           |
| Escrow Deposit Disbursements Related to Property Acquisition                                                                            |           | $ 21,000       |
| Business Acquisition Purchase Price Allocation Asset Retirement Obligation                                                              | $ (4,326)      | $ (4,326)      |
| Oil and gas producing wells, gross                                                                                                      | 3,000          | 3,000          |
| Bayswater Acquisition [Member]                                                                                                          |           |           |
| **Business Acquisition [Line Items]**                                                                                                   |           |           |
| Business Acquisition, Pro Forma Revenue                                                                                                 | $ 19,800       | $ 41,600       |
| Payments to Acquire Business Two, Net of Cash Acquired                                                                                  |           | 168,560        |
| Payments to Acquire Businesses, Gross                                                                                                   |           | 189,560        |
| Purchase Accounting Adjustments                                                                                                         |           | 10,422         |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets | 468            | 468            |
| Business Acquisitions Purchase Price Allocation Proved Natural Gas Properties                                                           | 205,834        | 205,834        |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment                   | 2,796          | 2,796          |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets                                           | 209,098        | 209,098        |
| Business Combination, Contingent Consideration, Liability, Current                                                                      | (4,429)        | (4,429)        |
| Business Acquisition Purchase Price Allocation Asset Retirement Obligation                                                              | (4,687)        | (4,687)        |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities                           | (9,116)        | (9,116)        |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net                                              | $ 199,982      | $ 199,982      |
| Acquired Acreage | a                                                                                                                    | 7,400          | 7,400          |
| Oil and gas drilling locations, gross | Wells                                                                                           | 220            | 220            |
| Productive Oil Wells, Number of Wells, Net | Wells                                                                                      | 24             | 24             |
| Business Acquisition, Pro Forma Net Income (Loss)                                                                                       | $ 11,600       | $ 23,600       |
| Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares                                                                | $ 0.18         | $ 0.36         |

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The total number of producing oil and natural gas wells in which the entity owns an working interest.
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| - Definition
The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.
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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.
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| - Definition
Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.
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Amount of assets acquired at the acquisition date.
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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.
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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.
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Amount of assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.
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Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.
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| - Definition
Amount of escrow deposit disbursements related to property acquisition in noncash investing or financing transactions.
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| - Definition
Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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The cash outflow associated with a second acquisition of a business, net of the cash acquired from the purchase.
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.
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| - Definition
The total number of producing oil wells and oil wells capable of production, in which the entity owns a fractional working interest.
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