Note 4 - Inventory (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	June 30, 2013		December 31, 2012
	(in thousands)
Tubular goods, accessories and spare parts	$	18,709	$	18,343
Crude oil		1,360		1,508
Inventory	$	20,069	$	19,851

	June 30, 2013		December 31, 2012
Crude oil (barrels)		17,020		17,876
Crude oil (cost per barrel)	$	79.93	$	84.34