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Short Term Debt - Short Term Debt - Summary Table 1 (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
UBS short-term credit line |  |
Beginning balance | $ 1,500,000 | $ 2,000,000
Borrowing | 2,300,000 | 1,200,000
Repayments | (2,998,000) | (1,700,000)
Ending balance | 802,000 | 1,500,000
RBC short term margin loan |  |
Beginning balance |  |
Borrowing |  | 1,465,000
Repayments |  | (1,465,000)
Ending balance |  |
Total short-term margin loans | $ 802,000 | $ 1,500,000

X
- Definition No authoritative reference available. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Details
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- Definition No authoritative reference available. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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X
- Definition No authoritative reference available. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
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- Details
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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant