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Marketable Equity Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investments in marketable equity securities, at fair value | $ 1,051 | $ 949
Kinross Gold Corp [Member] |  |
Investments in marketable equity securities, at fair value | $ 477 | $ 409
Shares | 100,000 | 100,000
Vendetta Mining Corp. [Member] |  |
Investments in marketable equity securities, at fair value | $ 234 | $ 229
Shares | 7,750,000 | 7,750,000
Vox Royalty Corp. [Member] |  |
Investments in marketable equity securities, at fair value | $ 325 | $ 311
Shares | 134,055 | 134,055
Highland Silver Corp [Member] |  |
Investments in marketable equity securities, at fair value | $ 15 | $ 0
Shares | 200,000 | 200,000

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