v3.25.4

Mineral Properties (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Mineral Properties |  |
Total exploration mineral properties | $ 16,732 | $ 16,701
Cat Creek (Colorado - US) [Member] |  |
Mineral Properties |  |
Total exploration mineral properties | 12 | 12
Golden Crest (South Dakota - US) [Member] |  |
Mineral Properties |  |
Total exploration mineral properties | 1,078 | 1,078
Bright Angel Project (Colorado - US) [Member] |  |
Mineral Properties |  |
Total exploration mineral properties | 31 | 0
Lik project (Alaska - US) |  |
Mineral Properties |  |
Total exploration mineral properties | $ 15,611 | $ 15,611

X
- References No definition available. + Details
Name: | srt_ExtractiveIndustriesAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Mineral properties, net of adjustments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_MineralPropertiesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=xpl_CatCreekColoradoUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=xpl_GoldenCrestSouthDakotaUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=xpl_BrightAngelProjectColoradoUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=xpl_LikProjectAlaskaUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |