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Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Accounts Receivable:    
Joint interest billing $ 1,692 $ 3,339
Trade receivables 1,188 2,246
Oil and gas sales 2,344 7,284
Tax refund receivable   1,720
Other 481 189
Accounts Receivable, Gross 5,705 14,778
Less: Allowance for doubtful accounts (418) (418)
Total 5,287 14,360
Accounts Payable:    
Trade 519 261
Royalty and other owners 3,735 4,227
Partner advances 1,180 1,024
Other 762 1,122
Total 6,196 6,634
Accrued Liabilities:    
Compensation and related expenses 3,968 3,620
Property costs 1,556 2,829
Other 19 387
Total $ 5,543 $ 6,836