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v3.23.2

Related Party Transactions - Additional Information (Detail) |  |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |
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Jun. 13, 2023 USD ($) | May 02, 2023 USD ($) shares | Jan. 30, 2023 USD ($) shares | Dec. 20, 2022 USD ($) | Oct. 25, 2022 | Aug. 09, 2022 USD ($) | Jun. 01, 2022 USD ($) StorageFacility StorageProperty | Mar. 01, 2022 | Dec. 30, 2021 StorageFacility | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) StorageFacility shares | Jun. 30, 2022 USD ($) shares | Dec. 31, 2022 USD ($) | Aug. 29, 2022 USD ($) | May 01, 2022 USD ($) | Dec. 31, 2021 USD ($) | Oct. 07, 2021 USD ($) | Mar. 10, 2021 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum dealer manager commission fee percentage of proceeds from Primary Offering |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |
Change in deferred tax liability |  |  |  |  |  |  |  |  |  |  |  | $ (185,138) | $ (799,123) |  |  |  |  |  |
Number of self storage facilities | StorageFacility |  |  |  |  |  |  |  |  | 2 |  |  | 153 |  |  |  |  |  |  |
Outstanding principal, plus accrued interest |  |  |  |  |  |  |  |  |  |  |  | $ 12,016,875 | 86,237,235 |  |  |  |  |  |
Principal borrowing amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700,000,000 |
Other Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss related to equity interest |  |  |  |  |  |  |  |  |  | $ 300,000 |  | 500,000 |  |  |  |  |  |  |
Dividend distribution received |  |  |  |  |  |  |  |  |  | 86,000 |  | 170,000 |  |  |  |  |  |  |
Managed REIT Platform Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reimbursements payable to SAM under the Administrative Services Agreement |  |  |  |  |  |  |  |  |  | 102,000 | $ 80,000 | $ 169,000 | 125,000 |  |  |  |  |  |
Managed REIT Platform Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of revenue from tenant protection programs |  |  |  |  |  |  |  |  |  |  |  | 0.10% |  |  |  |  |  |  |
Receivables due from related parties |  |  |  |  |  |  |  |  |  | $ 5,900,000 |  | $ 5,900,000 |  | $ 2,000,000.0 |  |  |  |  |
SSGT II Merger Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated distribution value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,100,000 |  |  |
Gain resulting from acquisition of unconsolidated affiliates |  |  |  |  |  |  | $ 16,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Write-off of carrying value related to intangible asset |  |  |  |  |  |  | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Change in deferred tax liability |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Number of self storage facilities | StorageFacility |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |
Number of operating self storage property | StorageProperty |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Class A Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale commission fees percentage of proceed from Primary Offering |  |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |  |  |
Class T Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale commission fees percentage of proceed from Primary Offering |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |
Managed REIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  |  | 0.10% |  | 0.10% |  |  |  |  |  |  |
TRS subsidiary | Managed REIT Platform Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of revenue from tenant protection programs |  |  |  |  |  |  |  |  |  |  |  | 99.90% |  |  |  |  |  |  |
TRS subsidiary | Managed REIT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  |  | 99.90% |  | 99.90% |  |  |  |  |  |  |
Pacific Oak Holding Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest entity non-voting ownership percentage |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |
SmartStop Asset Management | Strategic Transfer Agent Services, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of membership interest |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Transfer Agent Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfer agent agreement term |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Transfer agent renewal agreement term |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Transfer agent agreement termination description |  |  |  |  |  |  |  |  |  |  |  | The initial term of the transfer agent agreement was three years, which term is automatically renewed for one year successive terms, but either party may terminate the transfer agent agreement upon 90 days’ prior written notice. In the event that we terminate the transfer agent agreement, other than for cause, we will pay our transfer agent all amounts that would have otherwise accrued during the remaining term of the transfer agent agreement; provided, however, that when calculating the remaining months in the term for such purposes, such term is deemed to be a 12 month period starting from the date of the most recent annual anniversary date. |  |  |  |  |  |  |
SSGT II Advisor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly asset management fee |  |  |  |  |  |  |  |  |  |  |  | 0.1042% |  |  |  |  |  |  |
Monthly asset management fee one twelfth of less than one percentage of average invested assets |  |  |  |  |  |  |  |  |  |  |  | one-twelfth of 1.25% |  |  |  |  |  |  |
SST VI Advisory Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of acquisition fees of purchase price of contract |  |  |  |  |  |  |  |  |  | 1.00% |  | 1.00% |  |  |  |  |  |  |
Monthly asset management fee |  |  |  |  |  |  |  |  |  |  |  | 0.0625% |  |  |  |  |  |  |
Reimbursable Costs |  |  |  |  |  |  |  |  |  |  |  | $ 25,000 | $ 8,000 |  |  |  |  |  |
Monthly asset management fee one twelfth of less than one percentage of average invested assets |  |  |  |  |  |  |  |  |  |  |  | one-twelfth of 0.75% |  |  |  |  |  |  |
SST VI Advisory Agreement | Class W |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of offering cost without reimbursement |  |  |  |  | 1.50% |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Shares sold in public offering | shares |  |  |  |  |  |  |  |  |  |  |  | 38,000 | 0 |  |  |  |  |  |
SST VI Advisory Agreement | Pacific Oak Holding Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest entity non-voting ownership percentage |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |
SSGT III Advisory Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of acquisition fees of purchase price of contract |  |  |  |  |  |  |  |  |  | 1.00% |  | 1.00% |  |  |  |  |  |  |
Monthly asset management fee |  |  |  |  |  |  |  |  |  |  |  | 0.0625% |  |  |  |  |  |  |
Monthly asset management fee one twelfth of less than one percentage of average invested assets |  |  |  |  |  |  |  |  |  |  |  | one-twelfth of 0.75 |  |  |  |  |  |  |
SSGT III Advisory Agreement | Disposition Fee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of disposition fee of contract sales price |  |  |  |  |  |  |  |  |  | 1.50% |  | 1.50% |  |  |  |  |  |  |
SSGT III Advisory Agreement | Disposition Fee | Pacific Oak Holding Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of disposition fee of contract sales price |  |  |  |  |  |  |  |  |  | 10.00% |  | 10.00% |  |  |  |  |  |  |
Administrative Services Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Receivables due from related parties |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000 |  |  |  |  |
Payables to related parties |  |  |  |  |  |  |  |  |  | $ 33,000 |  | $ 33,000 |  |  |  |  |  |  |
Administrative Services Agreement | Managed REIT Platform Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Administrative service fees |  |  |  |  |  |  |  |  |  | 460,000 | 135,000 | $ 500,000 | $ 320,000 |  |  |  |  |  |
SST VI OP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase units of limited partnership interest | shares |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase commitment amount |  |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of investment fee due upon closing |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of preferred investor distributions |  |  | SmartStop, through its subsidiary, received distributions, payable monthly in arrears, at a rate of 7.0% per annum from the date of issuance until the second anniversary of the date of issuance, 8.0% per annum commencing thereafter until the third anniversary of the date of issuance, 9.0% per annum commencing thereafter until the fourth anniversary of the date of issuance, and 10% per annum thereafter, payable monthly. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI OP | Other Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss related to equity interest |  |  |  |  |  |  |  |  |  |  | 200,000 |  | 300,000 |  |  |  |  |  |
Dividend distribution received |  |  |  |  |  |  |  |  |  |  | $ 70,000 |  | 140,000 |  |  |  |  |  |
SST VI OP | Series A Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares redeemed | shares |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest payable |  | $ 15,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI OP | Up to Second Anniversary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of distributions payable monthly in arrears |  |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI OP | Up to Third Anniversary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of distributions payable monthly in arrears |  |  | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI OP | Up to Fourth Anniversary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of distributions payable monthly in arrears |  |  | 9.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI OP | Investment Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of distributions payable monthly in arrears |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property Management Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of carrying value related to intangible asset |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of fee of former external property managers |  |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |  |  |
Construction management fee |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |
Cost of construction or capital improvement work |  |  |  |  |  |  |  |  |  |  |  | $ 10,000 |  |  |  |  |  |  |
One time fee for former external property managers |  |  |  |  |  |  |  |  |  |  |  | 3,750 |  |  |  |  |  |  |
Property Management Agreement | Other Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in deferred tax liability |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |
Property Management Agreement | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Our former external property management fee |  |  |  |  |  |  |  |  |  |  |  | 3,000 |  |  |  |  |  |  |
SmartStop OP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment of preferred investor |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000.0 |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000.0
SSGT III OP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding amount |  |  |  |  |  |  |  |  |  | 8,000,000.0 |  | 8,000,000.0 |  | 17,500,000 |  |  |  |  |
SSGT III OP | Other Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss related to equity interest |  |  |  |  |  |  |  |  |  | 200,000 |  | 400,000 |  |  |  |  |  |  |
Dividend distribution received |  |  |  |  |  |  |  |  |  | 65,000 |  | 119,000 |  |  |  |  |  |  |
SST VI |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding principal, plus accrued interest |  | $ 51,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal borrowing amount | $ 15,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal borrowing amount, currently available |  |  |  |  |  |  |  |  |  | 15,000,000.0 |  | $ 15,000,000.0 |  |  |  |  |  |  |
Debt instrument, fee percentage | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis | SOFR plus 3.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis, extended | SOFR plus 4.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI Mezzanine Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment Fee Percentage |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  |  |  |  |  |  | LIBOR plus 3.0% |  |  |  |  |  |  |  |  |  |
SST VI Mezzanine Loan | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increased the principal borrowing amount |  |  |  | $ 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI Mezzanine Loan | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 45,000,000 |  |
Increased the principal borrowing amount |  |  |  | $ 55,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI Mezzanine Loan | Pacific Oak Holding Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  | SOFR plus 3.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SST VI Mezzanine Loan | SST VI OP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line Of Credit Facility Additional Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000,000.0 |  |  |  |  |
Outstanding amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 35,000,000.0 |  |  |  |  |
SSGT III Mezzanine Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating self storage property | StorageFacility |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |
Debt issued |  |  |  |  |  | $ 50,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment Fee Percentage |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Principal borrowing amount |  |  |  |  |  |  |  |  |  | $ 9,500,000 |  | $ 9,500,000 |  | $ 17,500,000 |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  | SOFR plus 3.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, current borrowing capacity |  |  |  |  |  | $ 42,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |
SSGT III Mezzanine Loan | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increased the principal borrowing amount |  |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SSGT III Mezzanine Loan | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increased the principal borrowing amount |  |  |  | $ 77,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Upon Achievement Of Certain Financial Conditions | SSGT III Mezzanine Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  | SOFR plus 4.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Acquisition Fee as Percentage of Contract Purchase Price + References No definition available. + Details
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- Definition Advisory Agreement Asset Management Fee Percentage + References No definition available. + Details
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- Definition Commitment fee percentage + References No definition available. + Details
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- Definition Construction management fee minimum threshold value of capital improvement work. + References No definition available. + Details
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- Definition Construction Management Fee Percent on Cost Above Specific Limit + References No definition available. + Details
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- Definition Debt instrument, description of variable rate basis, extended. + References No definition available. + Details
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- Definition Line of credit facility additional borrowing capacity. + References No definition available. + Details
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- Definition Loss related to equity interest. + References No definition available. + Details
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- Definition Maximum dealer manager commission fees percentage of proceed from primary offering. + References No definition available. + Details
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- Definition Monthly assets management fees one twelfth of less than one percentage of assets value exceed specific value. + References No definition available. + Details
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- Definition Number of operating self storage property. + References No definition available. + Details
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- Definition Number Of Self Storage Facilities + References No definition available. + Details
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- Definition Percentage of investment fee due upon closing. + References No definition available. + Details
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- Definition Percentage Of Revenue From Tenant Protection Programs + References No definition available. + Details
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- Definition percentage of service fees on gross revenue for managing properties. + References No definition available. + Details
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- Definition Redemption price (Percentage of redemption amount). + References No definition available. + Details
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- Definition Preferred stock shares redeemed + References No definition available. + Details
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- Definition Property management monthly management fee. + References No definition available. + Details
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- Definition Purchase commitment amount. + References No definition available. + Details
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- Definition Purchase units of limited partnership interest. + References No definition available. + Details
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- Definition Rate of distributions payable monthly in arrears. + References No definition available. + Details
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- Definition Reimbursable costs. + References No definition available. + Details
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- Definition Reimbursements payable to SAM under the Administrative Services Agreement + References No definition available. + Details
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- Definition Related party transaction percentage of sales price of asset on disposition. + References No definition available. + Details
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- Definition Sale commission fees percentage of proceed from primary offering. + References No definition available. + Details
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- Definition Shares sold in public offering. + References No definition available. + Details
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- Definition Subordinated distribution value. + References No definition available. + Details
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- Definition Transfer agent agreement term. + References No definition available. + Details
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- Definition Transfer agent agreement termination description. + References No definition available. + Details
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- Definition Transfer agent renewal agreement term. + References No definition available. + Details
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- Definition Variable interest entity nonvoting ownership percentage + References No definition available. + Details
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- Definition Write-off of carrying value related to intangible asset. + References No definition available. + Details
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- Definition Amount for accounts payable to related parties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.17) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition For an unclassified balance sheet, amount of receivables arising from transactions with related parties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(3)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 + Details
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- Definition Amount of expense for administrative services provided to the limited liability company (LLC) or limited partnership (LP) by the managing member or general partner, affiliate of managing member or general partner, or affiliate of LLC or LP, for example, but not limited to, salaries, rent, or overhead costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Description of reference rate used for variable rate of debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Change during the period in carrying value for all deferred liabilities due within one year or operating cycle. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition Amount of interest payable on debt, including, but not limited to, trade payables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(h)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of increase (decrease) of the credit facility. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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