Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts Receivable:
Joint interest billing	$ 2,038	$ 2,475
Trade receivables	1,267	1,073
Oil and gas sales	7,292	3,469
Other	244	802
Accounts Receivable, Gross	10,841	7,819
Less: Allowance for doubtful accounts	(598)	(598)
Total	10,243	7,221
Accounts Payable:
Trade	1,234	876
Royalty and other owners	7,118	3,569
Partner advances	192	193
Other		579
Total	8,544	5,217
Accrued Liabilities:
Compensation and related expenses	3,371	3,331
Property costs	910	2,056
Taxes	1,016	1,016
Other		384
Total	$ 5,297	$ 6,787

Accounts payable due to partners.

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Accounts payable royalty and other owners current.

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Accounts receivable field services gross 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, after 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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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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