Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts Receivable:
Joint interest billing	$ 2,886	$ 2,345
Trade receivables	1,354	1,070
Oil and gas sales	6,087	4,078
Other	207	204
Accounts Receivable, Gross	10,534	7,697
Less: Allowance for doubtful accounts	(212)	(297)
Total	10,322	7,400
Accounts Payable:
Trade	5,273	3,967
Royalty and other owners	7,174	6,501
Prepaid drilling deposits	67	83
Other	788	1,414
Total	13,302	11,965
Accrued Liabilities:
Compensation and related expenses	2,887	2,295
Property costs	12,133	3,317
Income Tax	1,366	1,988
Other	569	584
Total	$ 16,955	$ 8,184

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Accounts receivable oil and gas sales 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 of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.

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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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