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Short Term Debt - Summary of Short Term Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
RMB Loan Borrowing
Beginning balance December 31, 2014	$ 5,000XPL_ShortTermDebtBeginningBalance / us-gaap_ShortTermDebtTypeAxis = XPL_RMBLoanBorrowingMember
Amortization of discount to interest cost
Ending balance March 31, 2015	5,000XPL_ShortTermDebtEndingBalance / us-gaap_ShortTermDebtTypeAxis = XPL_RMBLoanBorrowingMember
RMB Warrant Discount
Beginning balance December 31, 2014	(139)XPL_ShortTermDebtBeginningBalance / us-gaap_ShortTermDebtTypeAxis = XPL_RMBWarrantDiscountMember
Amortization of discount to interest cost	54us-gaap_AmortizationOfFinancingCostsAndDiscounts / us-gaap_ShortTermDebtTypeAxis = XPL_RMBWarrantDiscountMember
Ending balance March 31, 2015	(85)XPL_ShortTermDebtEndingBalance / us-gaap_ShortTermDebtTypeAxis = XPL_RMBWarrantDiscountMember
RMB Long Term Debt
Beginning balance December 31, 2014	4,861XPL_ShortTermDebtBeginningBalance / us-gaap_ShortTermDebtTypeAxis = XPL_RMBLongTermDebtMember
Amortization of discount to interest cost	54us-gaap_AmortizationOfFinancingCostsAndDiscounts / us-gaap_ShortTermDebtTypeAxis = XPL_RMBLongTermDebtMember
Ending balance March 31, 2015	$ 4,915XPL_ShortTermDebtEndingBalance / us-gaap_ShortTermDebtTypeAxis = XPL_RMBLongTermDebtMember

X

- Definition

Amount of noncash expense included in interest expense to allocate debt discount and premium, and the costs to issue debt and obtain financing over the related debt instruments. Alternate captions include noncash interest expense.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

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X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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- Details

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