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Derivative Instruments - Liabilities on derivative instruments (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Shares of Kinross
Ending liability balance		$ 3,000us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities
Sale of call	36,000XPL_ProceedsFromSaleOfDerivativeInstrument	90,000XPL_ProceedsFromSaleOfDerivativeInstrument
(Gain) on derivative instrument	(39,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	(90,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
KGC May 2014 $5 Call
Shares of Kinross	30XPL_SharesDerivative / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCMay20145CallMember
Ending liability balance
Sale of call	16,000XPL_ProceedsFromSaleOfDerivativeInstrument / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCMay20145CallMember
(Gain) on derivative instrument	(16,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCMay20145CallMember
KGC February 2014 $8 Call
Shares of Kinross	50XPL_SharesDerivative / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20148CallMember
Ending liability balance	1,000us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20148CallMember
Sale of call		35,000XPL_ProceedsFromSaleOfDerivativeInstrument / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20148CallMember
(Gain) on derivative instrument	(1,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20148CallMember	(34,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20148CallMember
KGC February 2014 $7 Call
Shares of Kinross	100XPL_SharesDerivative / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20147CallMember
Ending liability balance	2,000us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20147CallMember
Sale of call		55,000XPL_ProceedsFromSaleOfDerivativeInstrument / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20147CallMember
(Gain) on derivative instrument	(2,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20147CallMember	(53,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary20147CallMember
KGC February 2013 $11 Call
Shares of Kinross	100XPL_SharesDerivative / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary201311CallMember
Ending liability balance
(Gain) on derivative instrument		(3,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCFebruary201311CallMember
KGC May 2014 $6 Call
Shares of Kinross	100XPL_SharesDerivative / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCMay20146CallMember
Ending liability balance
Sale of call	20,000XPL_ProceedsFromSaleOfDerivativeInstrument / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCMay20146CallMember
(Gain) on derivative instrument	$ (20,000)us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 / us-gaap_DerivativeInstrumentRiskAxis = XPL_KGCMay20146CallMember

X

- Definition

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

The increase (decrease) during the period in the net carrying value of derivative instruments reported as assets and liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer).

+ References

No definition available.

+ Details

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X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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X

- Definition

Number of shares of Kinross Gold.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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X

- Details

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- Details

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