Commitments and Contingencies	12 Months Ended
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies: In acquiring its interests in mineral claims and leases, Solitario has entered into lease agreements, which may be canceled at its option without penalty. Solitario is required to make minimum rental and option payments in order to maintain its interests in certain claims and leases. See Note 2, “Mineral Properties,” above. Solitario estimates its 2018 property rentals and option payments, excluding certain earn-in payments discussed below, for properties Solitario owns or operate to be approximately $322,000. Assuming that Solitario’s joint ventures continue in their current status and that Solitario does not appreciably change its property positions on existing properties, approximately $305,000 of these annual payments are paid or are reimbursable to us by Solitario’s joint venture partners. In addition, Solitario may be required to make further payments in the future if it elects to exercise its options under those agreements or if Solitario enters into new agreements. Solitario has recorded an asset retirement obligation of $125,000 related to its Lik project in Alaska. See Note 2, “Mineral Properties,” above. Solitario leases office space under a non-cancelable operating lease for the Wheat Ridge, Colorado office which provides for total minimum annual rent payments of $43,000 through January of 2019.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

8. Commitments and Contingencies:

In acquiring its interests in mineral claims and leases, Solitario has entered into lease agreements, which may be canceled at its option without penalty. Solitario is required to make minimum rental and option payments in order to maintain its interests in certain claims and leases. See Note 2, “Mineral Properties,” above. Solitario estimates its 2018 property rentals and option payments, excluding certain earn-in payments discussed below, for properties Solitario owns or operate to be approximately $322,000. Assuming that Solitario’s joint ventures continue in their current status and that Solitario does not appreciably change its property positions on existing properties, approximately $305,000 of these annual payments are paid or are reimbursable to us by Solitario’s joint venture partners. In addition, Solitario may be required to make further payments in the future if it elects to exercise its options under those agreements or if Solitario enters into new agreements.

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

Solitario leases office space under a non-cancelable operating lease for the Wheat Ridge, Colorado office which provides for total minimum annual rent payments of $43,000 through January of 2019.