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Business and Significant Accounting Policies (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2016	Jul. 12, 2017	Jun. 29, 2017	Apr. 26, 2017
Accounting Policies [Abstract]
Common stock issued for issued and outstanding shares of Zazu - .3572 shares per 1 share of Zazu				19,788,183
Stock options granted to Zazu option holders				1,782,428
Percent of Solitario shareholders voting for issuance of shares					98.27%
Estimated purchase price to be recorded in third quarter 2017					$ 13,900
Ownership percentage in Bongara zinc deposit	39.00%
Ownership in Lik zinc deposit	50.00%
Interim debt financing provided to Zazu at 5% interest						$ 1,500
Per share price for debenture convertible to Zazu shares						$ 0.22
Accrued interest on Debenture	$ 13
Short term investments in U.S. Treasures	9,733
Bank certificates of deposit (maximum 250,000 each)	$ 2,999
Potentially dilutive shares related to outstanding common stock options		390,000	390,000

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