XML 39 R30.htm IDEA: XBRL DOCUMENT v3.23.3

Marketable Equity Securities (Details 1) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Marketable Equity Securities
Marketable equity securities at cost	$ 1,440	$ 1,440
Cumulative unrealized loss on marketable equity securities	(530)	(491)
Marketable equity securities at fair value	$ 910	$ 949

X

- Definition

Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

+ Details

Name:	us-gaap_EquitySecuritiesFvNiCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	xpl_InvestmentsInMarketableEquitySecuritiesAtFairValue
Namespace Prefix:	xpl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	xpl_UnrealizedGainLossOnMarketableEquitySecurities
Namespace Prefix:	xpl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant