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Fair Value Accounting (Tables) | 12 Months Ended
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Dec. 31, 2018
Fair Value Accounting |
Schedule of assets measured at fair value |
|  | Fair value at December 31, 2018 |
|  | Total |  | Level 1 |  | Level 3 |
Marketable securities |  | $ | — |  | $ | — |  | $ | — |
Other investments (Midas Gold Shares) |  |  | 5,462 |  |  | 5,462 |  |  | — |
Used mill equipment (non-recurring) |  |  | 5,500 |  |  | — |  |  | 5,500 |
|  | Fair value at December 31, 2017 |
|  | Total |  | Level 1 |  | Level 3 |
Marketable securities |  | $ | 90 |  | $ | 90 |  | $ | — |
Other investments (Midas Gold Shares) |  |  | 3,746 |  |  | 3,746 |  |  | — |
Used mill equipment (non-recurring) |  |  | 6,500 |  |  | — |  |  | 6,500 |

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- Definition Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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