Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts Receivable:
Joint interest billing	$ 6,360	$ 1,976
Trade receivables	2,177	1,979
Oil and gas sales	9,148	6,112
Tax refund receivable		4,760
Other	285	358
Accounts Receivable, Gross	17,970	15,185
Less: Allowance for doubtful accounts	(274)	(224)
Total	17,696	14,961
Accounts Payable:
Trade	1,628	1,174
Royalty and other owners	5,609	6,197
Due to partners	1,509	1,357
Other	706	825
Total	9,452	9,553
Accrued Liabilities:
Compensation and related expenses	3,528	2,907
Property costs	5,285	14,993
Other	249	531
Total	$ 9,062	$ 18,431

Accounts payable due to partners.

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Accrued liabilities property costs current.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

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Current portion of accounts receivable attributable to joint interest partners in oil and gas properties. These are billings to the non-operators associated with the operation of wells and are based on those owners' working interests in the wells. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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