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Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts Receivable:
Joint interest billing	$ 2,899	$ 1,976
Trade receivables	2,258	1,979
Oil and gas sales	11,377	6,112
Tax refund receivable	4,760	4,760
Other	798	358
Accounts Receivable, Gross	22,092	15,185
Less: Allowance for doubtful accounts	(224)	(224)
Total	21,868	14,961
Accounts Payable:
Trade	8,682	1,174
Royalty and other owners	5,165	6,197
Partner advances	1,197	1,143
Prepaid drilling deposits	160	214
Other	759	825
Total	15,963	9,553
Accrued Liabilities:
Compensation and related expenses	3,345	2,907
Property costs	5,085	14,993
Other	149	531
Total	$ 8,579	$ 18,431

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