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Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Accounts Receivable: |  |
Joint interest billings | $ 3,173 | $ 2,345
Trade receivables | 941 | 1,070
Oil and gas sales | 12,941 | 4,078
Other | 4 | 204
Accounts Receivable, Gross | 17,059 | 7,697
Less: Allowance for doubtful accounts | (98) | (297)
Total | 16,961 | 7,400
Accounts Payable: |  |
Trade | 14,317 | 3,967
Royalty and other owners | 7,073 | 5,909
Partner advances | 1,268 | 592
Prepaid drilling deposits | 67 | 83
Other | 1,890 | 1,414
Total | 24,615 | 11,965
Accrued Liabilities: |  |
Compensation and related expenses | 2,449 | 2,295
Property costs | 9,141 | 3,317
Income tax | 4,180 | 1,988
Other | 524 | 584
Total | $ 16,294 | $ 8,184

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