Share Repurchase Program	12 Months Ended
Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Share Repurchase Program	10. Share Repurchase Program On October 28, 2015, Solitario’s Board of Directors approved a share repurchase program that initially authorized Solitario to purchase up to two million shares of its outstanding common stock. During 2017 Solitario’s Board of Directors extended the expiration date of the share repurchase program through December 31, 2018. During the years ended December 31, 2017 and 2016, Solitario purchased 47,200 and 475,600 shares of Solitario common stock, respectively, for an aggregate purchase price of $32,000 and $248,000, respectively. As of December 31, 2017, Solitario has purchased a total of 667,800 shares for an aggregate purchase price of $348,000 under the share repurchase program since its inception.

Tabular disclosure of accelerated share repurchase (ASR) programs. An ASR is a combination of transactions that permits an entity to purchase a targeted number of shares immediately with the final purchase price of those shares determined by an average market price over a fixed period of time. An accelerated share repurchase program is intended to combine the immediate share retirement benefits of a tender offer with the market impact and pricing benefits of a disciplined daily open market stock repurchase program. ASRs can be disclosed as part of stockholders' equity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

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