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Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts Receivable: |  |
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 | 1,720
Other | 802 | 189
Accounts Receivable, Gross | 7,819 | 14,778
Less: Allowance for doubtful accounts | (598) | (418)
Total | 7,221 | 14,360
Accounts Payable: |  |
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: |  |
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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