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Additional Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Components of Balance Sheet Amounts | Accounts receivable at December 31, 2020 and 2019 consisted of the following:
|  | December 31, |
(Thousands of dollars) |  | 2020 |  |  | 2019 |
Joint interest billings |  | $ | 2,475 |  |  | $ | 3,339 |
Trade receivables |  |  | 1,073 |  |  |  | 2,246 |
Oil and gas sales |  |  | 3,469 |  |  |  | 7,284 |
Tax refund receivable |  |  | — |  |  |  | 1,720 |
Other |  |  | 802 |  |  |  | 189 |
|  |  | 7,819 |  |  |  | 14,778 |
Less: Allowance for doubtful accounts |  |  | (598 | ) |  |  | (418 | )
Total |  | $ | 7,221 |  |  | $ | 14,360 |
Accounts payable at December 31, 2020 and 2019 consisted of the following:
|  | December 31, |
(Thousands of dollars) |  | 2020 |  |  | 2019 |
Trade |  | $ | 876 |  |  | $ | 261 |
Royalty and other owners |  |  | 3,569 |  |  |  | 5,251 |
Partner advances |  |  | 193 |  |  |  | 205 |
Other |  |  | 579 |  |  |  | 917 |
Total |  | $ | 5,217 |  |  | $ | 6,634 |
Accrued liabilities at December 31, 2020 and 2019 consisted of the following:
|  | December 31, |
(Thousands of dollars) |  | 2020 |  |  | 2019 |
Compensation and related expenses |  | $ | 3,331 |  |  | $ | 3,620 |
Property costs |  |  | 2,056 |  |  |  | 2,829 |
Taxes |  |  | 1,016 |  |  |  | — |
Other |  |  | 384 |  |  |  | 387 |
Total |  | $ | 6,787 |  |  | $ | 6,836 |

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- Definition Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 3 -Paragraph i -Subsection 10 + Details
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