Commitments and Contingencies	3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and contingencies Solitario has recorded an asset retirement obligation of $125,000 related to its Lik project in Alaska. See Note 2, “Mineral Properties,” above. In August of 2018, Solitario agreed to fund a portion of a 2018 – 2019 drilling program at the Florida Canyon project. Per the agreement, Solitario will fund up to $1,580,000 of a planned 41-hole 17,000-meter drilling program to be conducted through December 31, 2019 (the “Drilling Program”). Upon Nexa completing the first 1,700 meters of the Drilling Program, Solitario will pay Nexa $527,000, upon completion of the next 1,700 meters (3,400 meters total) of the Drilling Program, Solitario will pay Nexa $527,000, and upon completion of the next 1,700 meters (5,100 meters total) of the Drilling Program, Solitario will pay Nexa the balance remaining on its $1,580,000 funding commitment, or $526,000. Solitario has no obligation to pay Nexa prior to the attainment of the separate 1,700-meter thresholds. The funding commitments are in the form of an advance on Solitario’s commitment to fund 30% of any future development of Florida Canyon under the existing joint venture agreement with Nexa. Accordingly, in the event Florida Canyon is developed, which cannot be assured at this time, any funds paid to Nexa under this agreement, will reduce the amount of Solitario’s obligation to fund 30% of future development costs, and / or repay loans from Nexa for future development costs at the Florida Canyon project. During 2018, Nexa completed four holes and a total of 2,203 meters under the Drilling Program and Solitario recorded a charge to exploration expense of $527,000. As of March 31, 2019, Solitario has recorded an account payable to Nexa of $527,000, which was paid in April 2019. Should Nexa complete the remaining 2,897 meters (5,100 meters less the completed 2,203 meters) during the remainder of 2019, Solitario will be obligated to pay Nexa $1,053,000 during 2019.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

8. Commitments and contingencies

Solitario has recorded an asset retirement obligation of $125,000 related to its Lik project in Alaska. See Note 2, “Mineral Properties,” above.

In August of 2018, Solitario agreed to fund a portion of a 2018 – 2019 drilling program at the Florida Canyon project. Per the agreement, Solitario will fund up to $1,580,000 of a planned 41-hole 17,000-meter drilling program to be conducted through December 31, 2019 (the “Drilling Program”). Upon Nexa completing the first 1,700 meters of the Drilling Program, Solitario will pay Nexa $527,000, upon completion of the next 1,700 meters (3,400 meters total) of the Drilling Program, Solitario will pay Nexa $527,000, and upon completion of the next 1,700 meters (5,100 meters total) of the Drilling Program, Solitario will pay Nexa the balance remaining on its $1,580,000 funding commitment, or $526,000. Solitario has no obligation to pay Nexa prior to the attainment of the separate 1,700-meter thresholds. The funding commitments are in the form of an advance on Solitario’s commitment to fund 30% of any future development of Florida Canyon under the existing joint venture agreement with Nexa. Accordingly, in the event Florida Canyon is developed, which cannot be assured at this time, any funds paid to Nexa under this agreement, will reduce the amount of Solitario’s obligation to fund 30% of future development costs, and / or repay loans from Nexa for future development costs at the Florida Canyon project. During 2018, Nexa completed four holes and a total of 2,203 meters under the Drilling Program and Solitario recorded a charge to exploration expense of $527,000. As of March 31, 2019, Solitario has recorded an account payable to Nexa of $527,000, which was paid in April 2019. Should Nexa complete the remaining 2,897 meters (5,100 meters less the completed 2,203 meters) during the remainder of 2019, Solitario will be obligated to pay Nexa $1,053,000 during 2019.