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v2.4.0.8

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Operating activities: |  |
Net loss | $ (1,643) | $ (2,700)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Unrealized (gain) loss on derivative instruments | (67) | 76
Depreciation and amortization | 21 | 42
Loss on equity method investment | 896 | 339
(Gain) loss on warrant liability | (953) | 729
Employee stock option expense | 206 | 523
Deferred income tax expense | (23) | (432)
Amortization of discount on long-term debt |  | 187
Property abandonment and impairment | 13 | 24
Gain on asset and equity security sales | (319) | (1,472)
Changes in operating assets and liabilities: |  |
Prepaid expenses and other current assets | 76 | 272
Accounts payable and other current liabilities | (18) | 277
Net cash used in operating activities | (1,811) | (2,135)
Investing activities: |  |
Additions to mineral properties | (1,640) | (2,557)
Other assets, net | 45 | (86)
Proceeds from mineral property sale receivable | 4,000 | 6,000
Proceeds from asset sales | 107 | 68
Proceeds from sale of marketable equity securities | 358 | 1,591
Net cash provided by investing activities | 2,870 | 5,016
Financing activities: |  |
Short-term borrowing | 1,117 | 1,565
Repayment of short-term borrowing | (2,617) | (3,171)
Repayment of long-term debt | (750) | (750)
Proceeds from long-term debt | 2,000 | 1,500
Deferred offering costs |  | (588)
Contribution from noncontrolling interest | 250 |
Proceeds from sale of common stock | 2,060 | 275
Proceeds from exercise of options | 183 |
Noncontrolling interest contribution, net |  | 50
Distribution to noncontrolling interest | (50) |
Payment to noncontrolling interest | (500) | (169)
Net cash provided by financing activities | 1,693 | (1,288)
Net increase in cash and cash equivalents | 2,752 | 1,593
Cash and cash equivalents, beginning of period | 616 | 432
Cash and cash equivalents, end of period | 3,368 | 2,025
Supplemental disclosure of cash flow information: |  |
Cash paid for interest, capitalized to mineral property | 137 |
Capitalized non-cash interest | 420 |
Capitalized depreciation | 23 |
Repayment of loan to noncontrolling interest |  | 373
Royalty sale receivable |  | 4,000
Warrant liability |  | 650
Issuance of stock for mineral property | 41 |
Issuance of stock to noncontrolling interest | 126 | 71
Transfer of contra-noncontrolling interest to noncontrolling interest upon earn-in |  | 531
Disproportionate share entry from noncontrolling interest to additional paid-in-capital upon earn-in |  | $ 2,983

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Name: | XPL_PaymentsMadeForAdditionsToMineralProperties
Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

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

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | XPL_TransferOfContraNonControllingInterestToNonControllingInterestUponEarnIn
Namespace Prefix: | XPL_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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