XML 50 R31.htm IDEA: XBRL DOCUMENT
v3.22.4

Marketable Equity Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Marketable equity securities at fair value | $ 949 | $ 1,307
Kinross Gold Corp |  |
Marketable equity securities at fair value | $ 409 | $ 581
Shares | 100,000 | 100,000
Vox Royalty Corp. [Member] |  |
Marketable equity securities at fair value | $ 311 | $ 370
Shares | 134,055 | 134,055
Vendetta Mining Corp. [Member] |  |
Marketable equity securities at fair value | $ 229 | $ 356
Shares | 7,750,000 | 9,000,000
Highland Silver Corp [Member] |  |
Marketable equity securities at fair value | $ 0 | $ 0
Shares | 200,000 | 0

X
- References No definition available. + Details
Name: | sodi_AvailableForSalesSecuritiesCurrent
Namespace Prefix: | sodi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | sodi_MarketableEquitySecurityShares
Namespace Prefix: | sodi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sodi_VoxRoyaltyCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sodi_VendettaMiningCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sodi_HighlandSilverCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |