XML 75 R39.htm IDEA: XBRL DOCUMENT
v3.23.4

Schedule of Activity in Real Estate Facilities (Detail) - USD ($) | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2021 | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Real estate facilities |  |  |  |  |  |  |  |
Real estate facilities, beginning balance |  | $ 1,210,102,582 | $ 1,887,205,645 | $ 1,593,623,628 |  | $ 1,210,102,582 |  |
Facility acquisitions |  | 371,507,610 |  | 298,341,568 |  | 47,162,974 |  | $ 0
Impact of foreign exchange rate changes |  |  | (458,653) | (12,984,154) |  | (138,457) |  | 4,147,798
Improvements and additions |  |  | 8,237,964 | 8,224,603 | [1] | 12,151,893 | [2] |
Other facility acquisitions |  |  |  | 69,981,850 | [3] | 15,689,143 |  |
Disposition due to deconsolidation | [4] |  |  |  |  | (15,689,143) |  |
Acquisitions, additions and other | [4] |  |  |  |  | 15,689,143 |  |
Acquisitions |  |  | 23,696,536 |  |  |  |  |
Real estate facilities, ending balance |  |  | 1,918,681,492 | 1,887,205,645 |  | 1,593,623,628 |  | 1,210,102,582
Accumulated depreciation |  |  |  |  |  |  |  |
Accumulated depreciation, beginning balance |  | $ (115,903,045) | (202,682,688) | (155,926,875) |  | (115,903,045) |  | (83,692,491)
Depreciation expense |  |  | (39,331,373) | (48,400,073) |  | (40,158,233) |  | (31,711,102)
Impact of foreign exchange rate changes |  |  | 97,602 | 1,644,260 |  | 71,937 |  | (499,452)
Disposition due to deconsolidation | [4] |  |  |  |  | 62,466 |  |
Accumulated depreciation, ending balance |  |  | $ (241,916,459) | (202,682,688) |  | (155,926,875) |  | $ (115,903,045)
SST IV Merger Agreement |  |  |  |  |  |  |  |
Real estate facilities |  |  |  |  |  |  |  |
Facility acquisitions |  |  |  |  |  | $ 324,344,636 |  |
SSGT II Merger Agreement |  |  |  |  |  |  |  |
Real estate facilities |  |  |  |  |  |  |  |
Facility acquisitions |  |  |  | $ 228,359,718 |  |  |  |
[1] | Included herein consists of approximately $1.0 million of solar panel installations, the remainder being comprised of other general capital improvements.
[2] | Included herein is an addition to our Riverview, Florida property of approximately $2.3 million, which added approximately 25,400 net rentable square feet and approximately 150 additional units, and opened in June of 2021. The remainder consists primarily of solar panel installations, LED lighting conversions, and other general capital improvements.
[3] | Such amount includes four individual property acquisitions completed during the year ended December 31, 2022.
[4] | Such activity primarily represents the acquisition of a property completed by SST VI OP, which as of the acquisition date was consolidated within our consolidated financial statements. On May 1, 2021, we deconsolidated SST VI OP as we were no longer the primary beneficiary, which resulted in the removal of such facility from our consolidated balance sheet. Our investment in SST VI OP is now included within “Investments in and advances to managed REITs” within our consolidated balance sheet.

X
- Definition Real estate accumulated depreciation disposition due to deconsolidation. + References No definition available. + Details
Name: | stsff_RealEstateAccumulatedDepreciationDispositionDueToDeconsolidation
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Real estate accumulated depreciation foreign exchange gain loss impact. + References No definition available. + Details
Name: | stsff_RealEstateAccumulatedDepreciationForeignExchangeGainLossImpact
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Real estate, acquisitions, additions and other. + References No definition available. + Details
Name: | stsff_RealEstateAcquisitionsAdditionsAndOther
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Real estate disposition due to deconsolidation. + References No definition available. + Details
Name: | stsff_RealEstateDispositionDueToDeconsolidation
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Real estate facilities foreign exchange gain loss impact. + References No definition available. + Details
Name: | stsff_RealEstateFacilitiesForeignExchangeGainLossImpact
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Real estate facility acquisitions. + References No definition available. + Details
Name: | stsff_RealEstateFacilityAcquisitions
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Real estate investment property at cost excluding construction in progress. + References No definition available. + Details
Name: | stsff_RealEstateInvestmentPropertyAtCostExcludingConstructionInProgress
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Real estate other facility acquisitions. + References No definition available. + Details
Name: | stsff_RealEstateOtherFacilityAcquisitions
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Real estate facilities acquisitions + References No definition available. + Details
Name: | stsff_RealEstatefacilitiesAcquisitions
Namespace Prefix: | stsff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase in real estate investments related to improvements for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479438/970-360-S99-1 + Details
Name: | us-gaap_RealEstateImprovements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cumulative amount of depreciation for real estate property held for investment purposes. + 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)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
Name: | us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ReconciliationOfCarryingAmountOfRealEstateInvestmentsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ReconciliationOfRealEstateAccumulatedDepreciationRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of depreciation expense of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479438/970-360-S99-1 + Details
Name: | us-gaap_SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stsff_SSTIVMergerAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stsff_SSGTIIMergerAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |