XML 29 R37.htm IDEA: XBRL DOCUMENT v2.4.1.9

Marketable Equity Securities - Investment in Kinross Gold Corporation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Marketable Securities [Abstract]
Shares	480XPL_MarketableSecuritiesSharesKinross	600XPL_MarketableSecuritiesSharesKinross
Fair value
Current assets	$ 1,354,000XPL_ValueMarketableSecuritiesFairValueCurrentAssets	$ 1,577,000XPL_ValueMarketableSecuritiesFairValueCurrentAssets
Long term assets		$ 1,051,000XPL_ValueMarketableSecuritiesFairValueLongTermAssets

X

- Details

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

X

- Details

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

X

- Definition

Marketable securities of Kinross Gold, not including other marketable securities.

+ References

No definition available.

+ Details

Name:	XPL_MarketableSecuritiesSharesKinross
Namespace Prefix:	XPL_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Portion Marketable Securities reported in Current Assets.

+ References

No definition available.

+ Details

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

X

- Definition

Portion Marketable Securities reported in Long Term Assets.

+ References

No definition available.

+ Details

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