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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Net Changes in Capitalized Exploratory Well Costs | Net changes in capitalized exploratory well costs are reflected in the following table for the periods presented (in thousands):
| Successor |  |  | Predecessor
| Period from November 20, 2020 through December 31, 2020 |  |  | Period from January 1, 2020 through November 19, 2020 |  | December 31,
|  |  |  | 2019 |  | 2018
Beginning of period | $ | — |  |  |  | $ | — |  |  | $ | 4,457 |  |  | $ | — |
Exploratory well cost additions (pending determination of proved reserves) | — |  |  |  | — |  |  | — |  |  | 26,497 |
Exploratory well cost reclassifications (successful determination of proved reserves) | — |  |  |  | — |  |  | (4,222) |  |  | (22,040) |
Exploratory well dry hole costs (unsuccessful in adding proved reserves) | — |  |  |  | — |  |  | (235) |  |  | — |
End of period | $ | — |  |  |  | $ | — |  |  | $ | — |  |  | $ | 4,457 |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets and Consolidated Statements of Cash Flows (in thousands):
| Successor |  |  | Predecessor
| December 31, 2020 |  |  | November 19, 2020 |  | December 31, 2019
Cash and cash equivalents | $ | 15,856 |  |  |  | $ | 8,754 |  |  | $ | 20,019 |
Restricted cash | 4,370 |  |  |  | 11,800 |  |  | — |
Total cash, cash equivalents and restricted cash | $ | 20,226 |  |  |  | $ | 20,554 |  |  | $ | 20,019 |

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
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