Note 11 - Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2014

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Asset Retirement Obligations [Table Text Block]

	December 31, 2014		December 31, 2013
	(in thousands)
ARO as of the beginning of the period	$	1,564	$	2,708
Liabilities incurred during period		2,800		204
Accretion expense		133		238
Revisions in estimates during period		833		(1,586	)
ARO as of the end of the period	$	5,330	$	1,564