| Dec 31,
2011 | Dec 31,
2012 | Dec 31,
2013 | Dec 31,
2014 | Dec 31,
2015 | Dec 31,
2016 | Dec 31,
2017 | Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 |
|---|
| Cash and equivalents | 13 | 3 | 6 | 4 | 3 | 3 | 3 | 2 | 2 | 3 | 4 | 4 |
|---|
| Oil and natural gas sales receivable | 5 | 5 | 7 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 3 |
|---|
| Marketable equity securities | 0 | 0 | 0 | 0 | - | - | - | - | - | 0 | 0 | 0 |
|---|
| Other current assets | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | - | - | - | 1 |
|---|
| Real estate assets held for sale, net of selling costs | - | - | - | - | - | 1 | 1 | - | - | 1 | 0 | 0 |
|---|
| Total current assets | 37 | 26 | 13 | 8 | 7 | 5 | 6 | 4 | 3 | 5 | 6 | 8 |
|---|
| Unevaluated properties | - | - | - | - | 6 | 5 | 5 | 4 | 4 | 2 | 2 | 2 |
|---|
| Evaluated properties | - | - | - | 2 | 98 | 88 | 86 | 89 | 89 | 94 | 95 | 203 |
|---|
| Less accumulated depreciation, depletion, amortization and impairment | - | - | - | 72 | 80 | 83 | 83 | 84 | 84 | 88 | 88 | 97 |
|---|
| Net oil and natural gas properties | 91 | 86 | 87 | 88 | 23 | 10 | 8 | 9 | 8 | 7 | 8 | 108 |
|---|
| Pending acquisition | - | - | - | - | - | - | - | - | - | - | 3 | - |
|---|
| Property and equipment, net | 9 | 111 | 112 | - | - | - | - | - | - | - | 0 | 1 |
|---|
| Right of use asset | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 1 |
|---|
| Other assets | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
|---|
| Total other assets | - | - | - | - | - | - | - | - | - | - | 3 | 2 |
|---|
| Total assets | 162 | 141 | 127 | 124 | 33 | 17 | 15 | 15 | 13 | 12 | 18 | 118 |
|---|
| Accounts payable and accrued liabilities | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 8 |
|---|
| Accrued compensation and benefits | - | - | - | - | 1 | 0 | - | - | - | - | 1 | 1 |
|---|
| Commodity derivative liability | - | - | - | - | - | - | 0 | - | - | - | - | 2 |
|---|
| Asset retirement obligations-current | - | - | - | - | - | - | - | - | - | - | - | 1 |
|---|
| Warrant liability | - | - | - | - | - | - | - | - | - | - | 0 | - |
|---|
| Current lease obligation | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 0 |
|---|
| Total current liabilities | 21 | 13 | 7 | 8 | 17 | 11 | 2 | 2 | 1 | 2 | 3 | 11 |
|---|
| Credit facility | - | - | - | - | - | - | - | - | - | - | - | 12 |
|---|
| Asset retirement obligations | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 15 |
|---|
| Long-term lease obligation, net of current portion | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 1 |
|---|
| Deferred tax liability | - | - | - | - | - | - | - | - | - | - | - | 1 |
|---|
| Other noncurrent liabilities | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 |
|---|
| Total noncurrent liabilities | - | - | - | 8 | 1 | 2 | 3 | 1 | 1 | 2 | 1 | 28 |
|---|
| Total liabilities | - | - | - | - | - | - | - | - | 2 | 4 | 4 | 40 |
|---|
| Commitments and contingencies (Note 9) | - | - | - | - | - | - | - | - | - | - | - | - |
|---|
| Common stock, $0.01 par value; 245,000,000 and unlimited shares authorized; 25,023,812 and 4,676,301 shares issued and outstanding as of December 31, 2022 and 2021, respectively | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Additional paid-in capital | 123 | 123 | 124 | 124 | 125 | 128 | - | - | - | - | 149 | 217 |
|---|
| Accumulated deficit | 4 | -7 | -15 | -17 | -110 | -124 | -125 | -127 | -128 | -134 | -136 | -139 |
|---|
| Total shareholders’ equity | 127 | 116 | 109 | 107 | 15 | 4 | 11 | 10 | 9 | 9 | 13 | 78 |
|---|
| Total liabilities and shareholders’ equity | 162 | 141 | 127 | 124 | 33 | 17 | 15 | 15 | 13 | 12 | 18 | 118 |
|---|