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ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables) | 3 Months Ended
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Mar. 31, 2022
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | The following table summarizes the Company’s asset retirement obligations:
| March 31, 2022 |  | December 31, 2021
Asset retirement obligation, beginning of period | $ | 13,687 |  |  | $ | 13,038 |
Revision of estimate | 96 |  |  | (235) |
Disposal of non-core obligations | — |  |  | (269) |
Accretion of liabilities | 394 |  |  | 1,284 |
Settlements | — |  |  | (131) |
Asset retirement obligation, end of period | $ | 14,177 |  |  | $ | 13,687 |
Asset retirement obligation: |  |  |
Current | $ | 220 |  |  | $ | 27 |
Non-current | 13,957 |  |  | 13,660 |
Asset retirement obligation, end of period | $ | 14,177 |  |  | $ | 13,687 |
Schedule of Restricted Cash and Cash Equivalents | The following table summarizes the Company’s restricted cash:
| March 31, 2022 |  | December 31, 2021
Restricted cash, beginning of period | $ | 20,305 |  |  | $ | 20,817 |
Additional collateral posted | 11 |  |  | 48 |
Refunds of collateral | — |  |  | (560) |
Restricted cash, end of period | $ | 20,316 |  |  | $ | 20,305 |

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