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Statements of Operations (USD $)
In Thousands, except Share data
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Costs, expenses and other:        
Exploration expense $ 921 $ 953 $ 1,762 $ 1,728
Depreciation and amortization 10 20 21 44
General and administrative 689 1,082 1,645 1,560
Gain on derivative instruments (17) (6) (71) (118)
Interest expense 68   160  
Asset write downs   39   39
Interest and dividend income (7)   (57) (53)
Gain on sale of assets       (22)
Total costs, expenses and other 1,664 2,088 3,460 3,178
Other Income        
Gain on sale of marketable equity securities 302 553 1,870 553
Net loss of equity method investment (160)   (381)  
Total other income 142 553 1,489 553
Loss before income taxes (1,522) (1,535) (1,971) (2,625)
Income tax (expense) benefit 152 178 (93) 293
Net loss (1,370) (1,357) (2,064) (2,332)
Less net loss attributable to noncontrolling interest 521 65 1,054 135
Net loss attributable to Solitario shareholders $ (849) $ (1,292) $ (1,010) $ (2,197)
Loss per common share attributable to Solitario shareholders:        
Basic and diluted $ (0.03) $ (0.04) $ (0.03) $ (0.07)
Weighted average shares outstanding:        
Basic and diluted 33,027 29,750 33,027 29,750