Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Costs, expenses and other:
Exploration expense	$ 25us-gaap_ExplorationExpenseMining	$ 48us-gaap_ExplorationExpenseMining
Depreciation and amortization	3us-gaap_DepreciationAndAmortization	3us-gaap_DepreciationAndAmortization
General and administrative	554us-gaap_GeneralAndAdministrativeExpense	531us-gaap_GeneralAndAdministrativeExpense
Gain on derivative instruments	(82)	(32)
Total costs, expenses and other	500us-gaap_OtherCostAndExpenseOperating	550us-gaap_OtherCostAndExpenseOperating
Other income (expense)
Gain on sale of marketable equity securities		300us-gaap_MarketableSecuritiesGainLoss
Gain (loss) on warrant liability	49	(260)
Net loss of equity method investment		(125)
Total other income (expense)	49us-gaap_OtherIncome	(85)us-gaap_OtherIncome
Loss before income tax	(451)	(635)
Income tax benefit		100us-gaap_IncomeTaxExpenseBenefit
Net loss	(451)us-gaap_NetIncomeLoss	(535)us-gaap_NetIncomeLoss
Less net loss attributable to noncontrolling interest	1	3
Net loss attributable to Solitario shareholders	$ (450)	$ (532)
Basic and diluted	$ (0.01)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.01)us-gaap_EarningsPerShareBasicAndDiluted
Basic and diluted	39,248	38,130

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.