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Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2017

Asset Retirement Obligation Disclosure [Abstract]

Reconciliation of Total Reclamation Liability for Asset Retirement Obligations

The following is a reconciliation of the total reclamation liability for asset retirement obligations.

Balance at December 31, 2015		$	1,180
Additions and revisions of prior estimates			399
Reductions to liabilities due to revision of estimates			(211	)
Accretion expenses			16
Balance at December 31, 2016		$	1,384
Additions and revisions of prior estimates			7,084
Accretion expenses			514
Balance at December 31, 2017		$	8,982

During the fourth quarter of 2017, the Company reduced the expected mining period for a certain phase of its operations. This change in estimate resulted in an approximate $4,511 increase to the liability.

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- References

No definition available.

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- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859

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