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Revenue Mineral Property Sale	12 Months Ended
Dec. 31, 2019
Revenue Recognition [Abstract]
Revenue Mineral Property Sale	On January 22, 2019, Solitario completed the sale of its interest in certain royalties to SilverStream, discussed above and recorded mineral property revenue of $408,000 for the Royalty Sale, consisting of the fair value of the cash received on the date of the sale of $185,000 and the fair value of the SilverStream Note on the date of the sale of $263,000 less the carrying value of the royalties sold of $40,000. At closing of the Royalty Sale, Solitario received Cdn$250,000 in cash and the SilverStream Note in the principal amount of Cdn$350,000. As of December 31, 2019, the SilverStream Note is due June 30, 2020 and accrues interest at 8% per annum simple interest. Solitario recorded interest income of $12,000 from the SilverStream Note during 2019. As of December 31, 2019, the SilverStream Note was recorded at $268,000, based upon the current US dollar / Canadian dollar exchange rate, and Solitario recorded a credit to exchange gain of $5,000 related to the SilverStream Note, included in general and administrative expense during 2019. On April 26, 2018, Solitario sold its royalty interest in the non-producing Yanacocha property to a wholly owned subsidiary of Newmont for approximately $502,000 in cash. The Yanacocha Royalty covered 43 concessions totaling 36,052 hectares. Newmont owns the underlying mineral concessions covered by the Yanacocha Royalty. None of the concessions covered by the Yanacocha Royalty had any reported reserves or resources. Solitario had no mineral property capitalized cost in the Yanacocha Royalty and recorded Mineral Property Revenue of $502,000 during 2018.

Revenue Mineral Property Sale

12 Months Ended

Dec. 31, 2019

On January 22, 2019, Solitario completed the sale of its interest in certain royalties to SilverStream, discussed above and recorded mineral property revenue of $408,000 for the Royalty Sale, consisting of the fair value of the cash received on the date of the sale of $185,000 and the fair value of the SilverStream Note on the date of the sale of $263,000 less the carrying value of the royalties sold of $40,000.

At closing of the Royalty Sale, Solitario received Cdn$250,000 in cash and the SilverStream Note in the principal amount of Cdn$350,000. As of December 31, 2019, the SilverStream Note is due June 30, 2020 and accrues interest at 8% per annum simple interest. Solitario recorded interest income of $12,000 from the SilverStream Note during 2019. As of December 31, 2019, the SilverStream Note was recorded at $268,000, based upon the current US dollar / Canadian dollar exchange rate, and Solitario recorded a credit to exchange gain of $5,000 related to the SilverStream Note, included in general and administrative expense during 2019.

On April 26, 2018, Solitario sold its royalty interest in the non-producing Yanacocha property to a wholly owned subsidiary of Newmont for approximately $502,000 in cash. The Yanacocha Royalty covered 43 concessions totaling 36,052 hectares. Newmont owns the underlying mineral concessions covered by the Yanacocha Royalty. None of the concessions covered by the Yanacocha Royalty had any reported reserves or resources. Solitario had no mineral property capitalized cost in the Yanacocha Royalty and recorded Mineral Property Revenue of $502,000 during 2018.