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ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables) | 6 Months Ended
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Jun. 30, 2023
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | The following table summarizes the Company’s asset retirement obligations:
| June 30, 2023 |  | December 31, 2022
Asset retirement obligations, beginning of period | $ | 9,595 |  |  | $ | 13,687 |
Revision of estimate | — |  |  | (238) |
Accretion of liabilities | 620 |  |  | 1,556 |
Held for sale(1) | — |  |  | (5,410) |
Disposal of Alta Mesa asset retirement obligations (1) | (79) |  |  | — |
Asset retirement obligations, end of period | $ | 10,136 |  |  | $ | 9,595 |
(1)Asset retirement obligations held for sale as of December 31, 2022 are related to Alta Mesa and are included as asset retirement obligation and other liabilities held for sale on the Condensed Consolidated Balance Sheets. Disposal of Alta Mesa asset retirement obligations are related to the accretion expense on Alta Mesa through the closing date and is included within Gain on sale of assets on the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). See Note 5 – Property, Plant and Equipment and Mineral Properties for more information.
Schedule of Restricted Cash and Cash Equivalents | The following table summarizes the Company’s restricted cash:
| June 30, 2023 |  | December 31, 2022
Restricted cash, beginning of period | $ | 17,449 |  |  | $ | 20,305 |
Additional collateral posted, net | 10 |  |  | 734 |
Held for sale(1) | — |  |  | (3,590) |
Restricted cash, end of period | $ | 17,459 |  |  | $ | 17,449 |
(1)Restricted cash held for sale is related to Alta Mesa and is included as Asset retirement obligation and other liabilities held for sale on the Condensed Consolidated Balance Sheets. See Note 5 – Property, Plant and Equipment and Mineral Properties for more information.

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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