XML 171 R33.htm IDEA: XBRL DOCUMENT
v3.22.1

Marketable Equity Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Marketable equity securities at fair value | $ 1,307 | $ 1,620
Vox Royalty Corp. [Member] |  |
Marketable equity securities at fair value | $ 370 |
Shares | 134,055 |
Vendetta Mining Corp. [Member] |  |
Marketable equity securities at fair value | $ 356 |
Shares | 9,000,000 |
Kinross Gold Corp |  |
Marketable equity securities at fair value | $ 581 |
Shares | 100,000 |

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

X
- Definition Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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