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v3.20.1

Investments (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost | $ 18,831 |  | $ 18,831
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (3,551) |  | (1,265)
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax | 11,546 |  | 18,080
Available-for-sale Securities | 26,826 |  | 35,646
Debt Securities, Available-for-sale [Abstract] |  |  |
Marketable Securities, Realized Gain (Loss) | 0 | $ 8 |
Equity and debt securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Available-for-sale Securities |  |  | 35,646
Metalla Royalty & Streaming Ltd. | Equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost | 10,463 |  | 10,463
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 |  | 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax | 11,546 |  | 17,725
Available-for-sale Securities | 22,009 |  | 28,188
Integra Resources Corp. [Member] | Equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost | 5,000 |  | 5,000
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (1,463) |  | 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax | 0 |  | 355
Available-for-sale Securities | 3,537 |  | 5,355
Rockhaven Resources, Ltd. [Member] | Equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost | 2,064 |  | 2,064
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (1,101) |  | (376)
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax | 0 |  | 0
Available-for-sale Securities | 963 |  | 1,688
Other Investments [Member] | Equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost | 1,304 |  | 1,304
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (987) |  | (889)
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax | 0 |  | 0
Available-for-sale Securities | 317 |  | 415
Level 3 | Equity and debt securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Available-for-sale Securities |  |  | $ 0
Available-for-sale Securities | Level 3 | Equity and debt securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Available-for-sale Securities | $ 0 |  |

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