Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligation (Details Narrative)

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Asset Retirement Obligation (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Mar. 31, 2017
Asset retirement obligation $ 756   $ 745 $ 700
Accretion expense 11 $ 11    
Other Assets        
Contributed to the Trust Fund $ 670