Share Repurchase Program	12 Months Ended
Dec. 31, 2018
Accelerated Share Repurchases [Line Items]
Share Repurchase Program	12. Share Repurchase Program On October 28, 2015, Solitario’s Board of Directors approved a share repurchase program that authorized Solitario to purchase up to two million shares of its outstanding common stock. During 2018 Solitario’s Board of Directors extended the expiration date of the share repurchase program through December 31, 2019. During the years ended December 31, 2018 and 2017, Solitario purchased 263,100 and 47,200 shares of Solitario common stock, respectively, for an aggregate purchase price of $101,000 and $32,000, respectively. As of December 31, 2018, Solitario has purchased a total of 930,900 shares for an aggregate purchase price of $449,000 under the share repurchase program since its inception.

Share Repurchase Program

12 Months Ended

Dec. 31, 2018

Accelerated Share Repurchases [Line Items]

12. Share Repurchase Program

On October 28, 2015, Solitario’s Board of Directors approved a share repurchase program that authorized Solitario to purchase up to two million shares of its outstanding common stock. During 2018 Solitario’s Board of Directors extended the expiration date of the share repurchase program through December 31, 2019. During the years ended December 31, 2018 and 2017, Solitario purchased 263,100 and 47,200 shares of Solitario common stock, respectively, for an aggregate purchase price of $101,000 and $32,000, respectively. As of December 31, 2018, Solitario has purchased a total of 930,900 shares for an aggregate purchase price of $449,000 under the share repurchase program since its inception.