Accounts Receivable and Major Customers

6 Months Ended

Jun. 30, 2012

Accounts Receivable and Major Customers

4. Accounts Receivable and Major Customers

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

	June 30, 2012			December 31, 2011
Customers	$	35,603		$	49,763
Joint interest partners	18,516			22,755
Other	2,895			1,695
	57,014			74,213
Less: Allowance for doubtful accounts	(1,263		)	(1,781		)
	$	55,751		$	72,432

For the six months endedJune 30, 2012 and 2011, six customers accounted for$79.5 millionand$95.4 million, or approximately 50% and 68%, of our total consolidated product revenues. As of June 30, 2012 and December 31, 2011, $14.4 million and $29.8 million, or approximately26%and 41%, 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 these customers.