Annual report pursuant to Section 13 and 15(d)

Note 12 - Accrued Closure Costs and ARO - Reported Closure Liabilities (Details)

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Note 12 - Accrued Closure Costs and ARO - Reported Closure Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Balance $ 5,301 $ 5,508
Accretion expense 374 299
Payments (693) (331)
Asset Retirement Obligation, Revision of Estimate 2,333 (175)
Balance $ 7,315 $ 5,301