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Additional Balance Sheet Information - Components of Balance Sheet Amounts (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts Receivable:
Joint interest billing	$ 1,615	$ 2,667
Trade receivables	1,410	1,452
Oil and gas sales	4,898	3,576
Other	172	2,377
Accounts Receivable, Gross	8,085	10,072
Less: Allowance for doubtful accounts	(551)	(529)
Total	7,534	9,543
Accounts Payable:
Trade	2,728	3,289
Royalty and other owners	5,539	5,973
Partner advances	709	1,083
Prepaid drilling deposits	374	390
Other	1,130	1,620
Total	10,480	12,355
Accrued Liabilities:
Compensation and related expenses	2,547	2,294
Property costs	5,554	2,851
Other	2,219	977
Total	$ 10,310	$ 6,122

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