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v3.21.2

Acquisitions and Divestitures - Narrative (Details) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 02, 2021 USD ($) | Feb. 26, 2021 USD ($) $ / shares shares | Dec. 20, 2019 USD ($) a well | Dec. 31, 2020 USD ($) | Sep. 30, 2021 USD ($) $ / shares shares | Sep. 30, 2020 USD ($) $ / shares shares | Mar. 10, 2021 USD ($) | Dec. 31, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, par value (USD per Share) | $ / shares |  |  |  |  | $ 0.001 | $ 0.001 |  |
Reverse stock split |  |  |  |  | 0.083 |  |  |
Common stock outstanding post merger (in Shares) | shares |  | 17,800,000 |  |  | 19,672,050 | 0 |  |
Transaction costs |  |  |  |  | $ 3,732 | $ 1,431 |  |
Loss on discontinued operations |  |  |  |  | (18,797) | 0 |  |
Kansas Properties |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Consideration from discontinued operations |  |  |  |  |  |  | $ 3,500 |
Discontinued Operations, Disposed of by Sale | Kansas Properties |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Loss on discontinued operations |  |  |  |  | (18,797) |  |  |
Consideration from discontinued operations | $ 3,500 |  |  |  |  |  | $ 3,500 |
Closing costs | $ 200 |  |  |  |  |  |  |
Kansas Properties |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Loss on discontinued operations |  |  |  |  | 18,800 |  |  |
J. Cleo Thompson and James Cleo Thompson, Jr., L.P. | Natural Gas |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of net acres acquired | a |  |  | 1,237 |  |  |  |  |
Number of wells acquired | well |  |  | 17 |  |  |  |  |
Number of wells acquired, producing | well |  |  | 11 |  |  |  |  |
Number of wells acquired, salt water disposal | well |  |  | 6 |  |  |  |  |
Consideration transferred |  |  | $ 3,300 |  |  |  |  |
Several Additional Acquisitions |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  | 400 | 800 |  |
Pro Forma |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  |  |  | $ 3,600
Impairment of oil and gas properties |  |  |  | $ 900 |  |  |  |
Riley Exploration |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Total consideration |  | $ 26,392 |  |  |  |  |  |
Transaction costs, cumulative |  |  |  |  | 5,000 |  |  |
Transaction costs, success fees |  |  |  |  | 1,750 |  |  |
Earnings or loss of acquiree since acquisition date, actual |  |  |  |  | 115 |  |  |
Riley Exploration | General and Administrative Expense |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  | $ 3,600 | $ 1,400 |  |
Tengasco |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, par value (USD per Share) | $ / shares |  | $ 0.001 |  |  |  |  |  |
Stock conversion ratio |  | 97.796467 |  |  |  |  |  |
Reverse stock split |  | 0.083 |  |  |  |  |  |

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