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ASSET RETIREMENT OBLIGATIONS (Tables) | 6 Months Ended
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Jun. 30, 2020
ASSET RETIREMENT OBLIGATIONS |
Schedule of reconciliation of asset retirement obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2020 |  | December 31, 2019
Asset retirement obligation liability, beginning balance | ​ | $ | 32,201 | ​ | $ | 29,402
Settlements | ​ |  | (128) | ​ |  | (513)
Accretion of liability | ​ |  | 914 | ​ |  | 1,680
Adjustment reflecting updated estimates | ​ |  | 262 | ​ |  | 1,012
Foreign exchange revaluation | ​ | ​ | (511) | ​ | ​ | 620
Asset retirement obligation liability, ending balance | ​ | $ | 32,738 | ​ | $ | 32,201
Less current portion | ​ | ​ | 2,383 | ​ | ​ | 2,610
Long-term portion | ​ | $ | 30,355 | ​ | $ | 29,591
Schedule of reclamation expense | The Company’s reclamation expenses consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended June 30, | ​ | Six months ended June 30,
​ |  | 2020 |  | 2019 | ​ | 2020 | ​ | 2019
Reclamation adjustment reflecting updated estimates | ​ | $ | — | ​ | $ | 24 | ​ | $ | 203 | ​ | $ | 88
Reclamation accretion | ​ | ​ | 457 | ​ | ​ | 403 | ​ | ​ | 914 | ​ | ​ | 800
Total | ​ | $ | 457 | ​ | $ | 427 | ​ | $ | 1,117 | ​ | ​ | 888

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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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