Note 12 - Accrued Closure Costs and ARO - Reported Closure Asset (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 2,575	$ 2,870
Amortization of closure and post-closure asset	(760)	(152)
Adjustment to closure and post-closure asset	2,333	(143)
Balance	$ 4,148	$ 2,575