7. ASSET RETIREMENT OBLIGATION REVISION	6 Months Ended
Jun. 30, 2017
Asset Retirement Obligation Disclosure [Abstract]
ASSET RETIREMENT OBLIGATION REVISION	During the three and six months ended June 30, 2017, we reduced our asset retirement obligation by $116 based on a revision of our previous estimate. The Wyoming Department of Environmental Quality concurred that the completed reclamation work was in compliance with its standards and the estimated amount for the remainder of the reclamation activities was $241. As we do not expect to incur any asset retirement obligation activities which would further reduce our obligation during the next 12 months, we have reclassified the current portion of our asset retirement obligation to long-term.

The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2175671

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