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Long Term Debt - Debt Payments Due Augusta (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Payment date |  |
June 1, 2012 |  | $ 750,000
June 1, 2013 | 750,000 | 750,000
June 1, 2014 | 750,000 | 750,000
June 1, 2015 | 1,000,000 | 1,000,000
Unamortized discount | (264,000) | (448,000)
Total | 2,236,000 | 2,802,000
Current portion | 727,000 | 727,000
Long-term debt | $ 1,509,000 | $ 2,075,000

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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
Name: | XPL_AugustaNotePaymentDueJune2013
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
Name: | XPL_AugustaNotePaymentDueJune2014
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
Name: | XPL_AugustaNotePaymentDueJune2015
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
Name: | XPL_CurrentPortionAugustaNote
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
Name: | XPL_LongTermPortionAugustaNote
Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | XPL_PaymentDateAugustNote
Namespace Prefix: | XPL_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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