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ASSET RETIREMENT OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2019
ASSET RETIREMENT OBLIGATIONS |
Schedule of reconciliation of asset retirement obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2019 |  | December 31, 2018
Asset retirement obligation liability, beginning balance | ​ | $ | 29,402 | ​ | $ | 24,722
Settlements | ​ |  | (513) | ​ |  | (392)
Accretion of liability | ​ |  | 1,680 | ​ |  | 1,205
Adjustment reflecting updated estimates | ​ |  | 1,012 | ​ |  | 5,024
Foreign exchange revaluation | ​ | ​ | 620 | ​ | ​ | (1,157)
Asset retirement obligation liability, ending balance | ​ | $ | 32,201 | ​ | $ | 29,402
Current portion | ​ | ​ | (2,610) | ​ | ​ | (734)
Long-term portion | ​ | $ | 29,591 | ​ | $ | 28,668
Schedule of reclamation expense | ​
The Company’s reclamation expenses consisted of the following: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ |  | 2019 |  | 2018 |  | 2017
Reclamation adjustment reflecting updated estimates | ​ | $ | 1,851 | ​ | $ | 2,259 | ​ | $ | 1,426
Reclamation accretion | ​ | ​ | 1,680 | ​ | ​ | 1,205 | ​ | ​ | 635
Total | ​ | $ | 3,531 | ​ | $ | 3,464 | ​ | $ | 2,061

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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://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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