Note 7 - Asset Retirement Obligation (Tables)

6 Months Ended

Jun. 30, 2013

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Asset Retirement Obligations [Table Text Block]

	June 30, 2013		December 31, 2012
	(in thousands)
ARO as of the beginning of the period	$	2,708	$	1,304
Liabilities settled during period		-		(2,093	)
Accretion expense		114		89
Revisions in estimates during period		-		3,408
ARO as of the end of the period	$	2,822	$	2,708