XML 77 R21.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Other Investments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Other Investments |
Summary of investment in Midas Gold Shares |
|  | December 31, 2019 |  | December 31, 2018 |
Fair value at beginning of period |  | $ | 5,462 |  | $ | 3,746 |
Midas Gold Shares sold |  |  | (415) |  |  | — |
Nusantara Resources shares |  |  | 272 |  |  | — |
Unrealized gain/(loss) |  |  | (1,643) |  |  | 1,716 |
Fair value at end of period |  | $ | 3,676 |  | $ | 5,462 |

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

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
Name: | us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration