Note 6 - Inventory (Tables)

12 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	December 31, 2014		December 31, 2013
	(in thousands)
Tubular goods, accessories and spare parts	$	9,854	$	15,534
Crude oil		2,024		1,834
Inventory	$	11,878	$	17,368

	December 31, 2014		December 31, 2013
Crude oil (barrels)		42,087		24,866
Crude oil (cost per barrel)	$	48.09	$	73.77