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Long Term Debt (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Jun. 08, 2013
Debt Disclosure [Abstract]
Accretion of interest related to long term debt	$ 127us-gaap_DebtInstrumentIncreaseAccruedInterest
Cash paid on Augusta long term note	1,800us-gaap_RepaymentsOfDebt
Ely portion of $750,000 payment on long term debt		$ 250XPL_PartnerPaymentTowardLongTermDebt
Ely issuance of shares as portion of payment on long term debt		5,131,150XPL_PartnerSharesReceivedTowardsPaymentOfLongTermDebt

X

- Details

Name:	us-gaap_DebtDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase for accrued, but unpaid interest on the debt instrument for the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

+ Details

Name:	us-gaap_DebtInstrumentIncreaseAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

Name:	us-gaap_RepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	XPL_PartnerPaymentTowardLongTermDebt
Namespace Prefix:	XPL_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	XPL_PartnerSharesReceivedTowardsPaymentOfLongTermDebt
Namespace Prefix:	XPL_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant