Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounts Receivable:
Joint interest billing	$ 2,741	$ 2,667
Trade receivables	1,249	1,452
Oil and gas sales	3,682	3,576
Other	2,473	2,377
Accounts Receivable, Gross	10,145	10,072
Less: Allowance for doubtful accounts	(535)	(529)
Total	9,610	9,543
Accounts Payable:
Trade	1,658	3,289
Royalty and other owners	5,087	5,973
Partner advances	1,389	1,083
Prepaid drilling deposits	161	390
Other	1,246	1,620
Total	9,541	12,355
Accrued Liabilities:
Compensation and related expenses	2,549	2,294
Property costs	7,230	3,302
Other	611	526
Total	$ 10,390	$ 6,122

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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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Carrying value as of the balance sheet date of obligations incurred and payable, which are not elsewhere specified in the taxonomy. 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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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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