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Business and Significant Accounting Policies (Details Narrative) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Nov. 03, 2014
Aug. 15, 2014
May 19, 2014
Jan. 28, 2014
Dec. 31, 2013
Jun. 18, 2013
Jun. 27, 2006
Accounting Policies [Abstract]                      
Amount borrowed in short-term margin loans against holding of Kinross shares                 $ 802,000    
Shares of Kinross owned         480,000            
Value of Kinross shares owned at a market price of $2.22 per share         1,000,000            
Equity investment in unconsolidated subsidiary     153,000                
Unrecognized losses related to 49% interest in unconsolidated subsidiary     461,000                
Options available under 2006 Stock Option Incentive Plan                     2,800,000
Awards at Cdn$2.40 voluntarily cancelled under 2006 Plan               1,797,000      
Grant date fair value of options under 2006 Stock Option Incentive Plan           1,618,000          
Options expired             264,000        
Proceeds from options exercised of 112,500 shares at Cdn$1.55       176,000              
Proceeds from options exercised of 5,000 shares at Cdn$1.49       7,000              
Options available for award under 2013 Solitario Exploration and Royalty Corp. Omnibus Stock and Incentive Plan                   1,750,000  
Options granted from 2013 plan as part of severance pay     50,562                
Options granted at an exercise price of $1.14 per share       120,000              
Potentially dilutive shares relatred to options excluded from earnings per share 3,748,000 2,600,900 3,748,000 2,600,900              
Shares related to warrants excluded from earnings per share 1,624,748 1,624,748 1,624,748 1,624,748              
Stock option expense for the amortization of grant date fair value 511,000 13,000 622,000 206,000              
Options granted under 2006 plan at Cdn$1.60 per share 1,990,000   1,990,000                
Grant date fair value of options granted under 2006 Plan     $ 78,000