XML 73 R44.htm IDEA: XBRL DOCUMENT
v3.20.1

COMMITMENTS AND CONTINGENCIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
COMMITMENTS AND CONTINGENCIES |
Schedule of minimum amounts under purchase commitments, long term leases covering office space, exploration expenditures, option payments on properties | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Payments due by period
​ | ​ | 2020 | ​ | 2021 | ​ | 2022 | ​ | 2023 | ​ | 2024 | ​ | Thereafter | ​ | Total
Mining and surface rights | ​ |  | 2,926 | ​ |  | 465 | ​ |  | 470 | ​ |  | 366 | ​ |  | 335 | ​ |  | — | ​ | ​ | 4,562
Reclamation costs(1) | ​ | ​ | 2,548 | ​ | ​ | 4,115 | ​ | ​ | 4,637 | ​ | ​ | 2,279 | ​ | ​ | 549 | ​ | ​ | 27,637 | ​ | ​ | 41,765
Other plant and equipment | ​ | ​ | 1,249 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,249
Exploration | ​ | ​ | 219 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 219
Total | ​ | $ | 6,942 | ​ | $ | 4,580 | ​ | $ | 5,107 | ​ | $ | 2,645 | ​ | $ | 884 | ​ | $ | 27,637 | ​ | $ | 47,795
(1) | Amounts presented represent the undiscounted uninflated future payments.

X
- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph (a) -Subparagraph (5) + Details
Name: | srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock
Namespace Prefix: | srt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration