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Investments | 3 Months Ended
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Mar. 31, 2019
Investment in Marketable Securities [Abstract] |
INVESTMENTS | INVESTMENTS Equity and Debt Securities The Company makes strategic investments in equity and debt securities of silver and gold exploration and development companies.
| At March 31, 2019
In thousands | Cost |  | Gross Unrealized Losses |  | Gross Unrealized Gains |  | Estimated Fair Value
Equity Securities |  |  |  |  |  |  |
Metalla Royalty & Streaming Ltd. | $ | 11,803 |  |  | $ | — |  |  | $ | 12,055 |  |  | $ | 23,858 |
Rockhaven Resources, Ltd. | 2,064 |  |  | (475 | ) |  | — |  |  | 1,589 |
Other | 1,356 |  |  | (928 | ) |  | — |  |  | 428 |
Equity securities | $ | 15,223 |  |  | $ | (1,403 | ) |  | $ | 12,055 |  |  | $ | 25,875 |
| At December 31, 2018
In thousands | Cost |  | Gross Unrealized Losses |  | Gross Unrealized Gains |  | Estimated Fair Value
Equity Securities |  |  |  |  |  |  |
Metalla Royalty & Streaming Ltd. | $ | 10,695 |  |  | $ | — |  |  | $ | 2,852 |  |  | $ | 13,547 |
Rockhaven Resources, Ltd. | 2,064 |  |  | (452 | ) |  | — |  |  | 1,612 |
Other | 1,376 |  |  | (946 | ) |  | — |  |  | 430 |
Equity securities | $ | 14,135 |  |  | $ | (1,398 | ) |  | $ | 2,852 |  |  | $ | 15,589 |
Debt Securities |  |  |  |  |  |  |
Metalla Royalty & Streaming Ltd. | $ | 2,271 |  |  | $ | (54 | ) |  | $ | — |  |  | $ | 2,217 |
Equity and debt securities | $ | 16,406 |  |  | $ | (1,452 | ) |  | $ | 2,852 |  |  | $ | 17,806 |
(1) In October 2018, the Company acquired the remaining outstanding shares of Northern Empire Resources Corp. not already owned by the Company. The Company performs a quarterly assessment on its debt securities with unrealized losses to determine if the securities are other than temporarily impaired. At March 31, 2019, there were no debt securities with unrealized losses.

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- Definition Investment in marketable securities. + References No definition available. + Details
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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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