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Employee Stock Compensation Plans - Grant Date Fair Value (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Aug. 15, 2015	Oct. 21, 2013	Jun. 08, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Option - grant date price			$ 0.94XPL_GrantDtPrice	$ 1.14XPL_GrantDtPrice
Option – grant date price (Cdn$)		$ 1.6XPL_GrantDtPriceCdn
Options granted		1,990,000us-gaap_EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares
Expected life yrs. grant date June 18, 2013	5 years
Expected life yrs. grant date October 21, 2013	5 years
Expected life yrs. grant date August 15, 2014	5 years
Expected volatility grant date June 18, 2013	68.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Expected volatility grant date October 21, 2013	67.00%XPL_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate2
Expected volatility grant date August 15, 2014	66.00%XPL_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate3
Risk free interest rate		1.60%XPL_ShareBasedCompenstionArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeRateOfInterest	1.39%XPL_ShareBasedCompenstionArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeRateOfInterest	1.24%XPL_ShareBasedCompenstionArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeRateOfInterest
Weighted average fair value		$ 0.81XPL_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionWeightedAverage	$ 0.53XPL_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionWeightedAverage	$ 0.65XPL_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionWeightedAverage
Grant date fair value		$ 1,618us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	$ 674us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	$ 78us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

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- Definition

The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Grant date price of options US Dollars.

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Grant date price of options Canadian Dollars.

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Expected term of option grants, second grant.

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Expected term of option grants, third grant.

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Expected volatility rate of option grants, second grant.

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Expected volatility rate of option grants, third grant.

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Weighted average ESOP plans reported in instant context.

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ESOP Risk-free interest rate reported in instant context.

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