Accounts Receivable and Major Customers

12 Months Ended

Dec. 31, 2012

Receivables [Abstract]

Accounts Receivable and Major Customers

Accounts Receivable and Major Customers

The following table summarizes our accounts receivable by type as of the dates presented:

	As of December 31,
	2012			2011
Customers	$	43,967		$	49,763
Joint interest partners	16,154			22,755
Other	4,523			1,695
	64,644			74,213
Less: Allowance for doubtful accounts	(1,666		)	(1,781		)
	$	62,978		$	72,432

For the year ended December 31, 2012, four customers accounted for $182.0 million, or approximately 59% of our consolidated product revenues. The revenues generated from these customers during 2012 were $60.1 million, $46.7 million, $41.5 million and $33.8 million or 19%, 15%, 14% and 11% of the consolidated total, respectively. As of December 31, 2012, $21.6 million, or approximately 34% of our consolidated accounts receivable, including joint interest billings, related to these customers. For the year ended December 31, 2011, three customers accounted for $120.4 million, or approximately 40% of our consolidated product revenues. The revenues generated from these customers during 2011 were $51.7 million, $34.6 million and $34.1 million, or approximately 17%, 12% and 11% of the consolidated total, respectively. As of December 31, 2011, $17.2 million, or approximately 24% of our consolidated accounts receivable, including joint interest billings, related to these customers. No significant uncertainties exist related to the collectability of amounts owed to us by any of these customers.