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Real Estate Facilities - Additional Information (Detail) |  |  |  |  |  |  |  |  |  | 12 Months Ended |
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Dec. 01, 2022 RealEstateVenture | Jun. 28, 2022 USD ($) | Jun. 01, 2022 USD ($) ft² StorageProperty State StorageFacility Landparcel StorageUnit RealEstateVenture $ / shares | May 17, 2022 USD ($) | May 10, 2022 USD ($) | Feb. 08, 2022 USD ($) | Dec. 30, 2021 StorageFacility | Mar. 17, 2021 ft² StorageUnit StorageFacility | Nov. 10, 2020 USD ($) RealEstateVenture StorageFacility State | Dec. 31, 2022 USD ($) StorageFacility RealEstateVenture Property State $ / shares | Dec. 31, 2021 $ / shares
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of self storage facilities | StorageFacility |  |  |  |  |  |  | 2 |  |  | 153 |
Number of states located for self storage facilities | State |  |  |  |  |  |  |  |  |  | 19 |
Consideration transferred |  |  |  |  |  |  |  |  |  | $ 51,200,000 |
Minority and Marketability Discount |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input |  |  | 0.06 |  |  |  |  |  | 0.06 |  |
Canada |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of self storage units | RealEstateVenture |  |  | 7,740 |  |  |  |  |  |  |  |
SST IV Merger Agreement |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of self storage facilities | StorageFacility |  |  |  |  |  |  |  | 24 |  |  |
Number of self storage units | StorageUnit |  |  |  |  |  |  |  | 18,000 |  |  |
Number of development joint venture properties | Property |  |  |  |  |  |  |  |  |  | 2 |
Cost related to acquisition |  |  |  |  |  |  |  |  | $ 8,400,000 |  |
Percentage of voting membership interest |  |  |  |  |  |  |  | 50.00% |  |  |
Net rentable area, primarily self storage space | ft² |  |  |  |  |  |  |  | 2,000,000.0 |  |  |
SST IV Merger Agreement | Canada |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of self storage facilities | StorageFacility |  |  |  |  |  |  |  |  | 24 |  |
Number of states located for self storage facilities | State |  |  |  |  |  |  |  |  | 9 |  |
Number of self storage real estate joint ventures | RealEstateVenture |  |  |  |  |  |  |  |  | 6 |  |
Number of development joint venture properties |  |  |  |  |  |  |  | 3 | 3 | 5 |
Number of development real estate properties |  |  |  |  |  |  |  | 3 | 3 | 1 |
Strategic Storage Trust IV, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  | $ 286,028,173 |  |
Algonquin Property [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  | $ 19,000,000.0 |  |  |  |  |
Occupancy percentage |  |  |  |  |  | 72.40% |  |  |  |  |
SSGT II Merger Agreement |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of right to receive shares, description |  |  | converted into the right to receive 0.9118 shares of our Class A Shares |  |  |  |  |  |  |  |
Number of self storage facilities | StorageFacility |  |  | 10 |  |  |  |  |  |  |  |
Number of states located for self storage facilities | State |  |  | 7 |  |  |  |  |  |  |  |
Number of self storage units | StorageUnit |  |  | 7,740 |  |  |  |  |  |  |  |
Number of development joint venture properties | Property |  |  |  |  |  |  |  |  |  | 1 |
Cost related to acquisition |  |  | $ 2,000,000.0 |  |  |  |  |  |  |  |
Consideration transferred |  |  | $ 261,158,513 |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 0.001 |  |  |  |  |  |  |  |
Percentage of voting membership interest |  |  | 50.00% |  |  |  |  |  |  |  |
Number of operating self storage properties | StorageProperty |  |  | 2 |  |  |  |  |  |  |  |
Number of land parcel developed into self storage facility | Landparcel |  |  | 1 |  |  |  |  |  |  |  |
Remaining percentage of membership interest |  |  | 50.00% |  |  |  |  |  |  |  |
Net rentable area, primarily self storage space | ft² |  |  | 853,900 |  |  |  |  |  |  |  |
SSGT II Merger Agreement | Canada |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of self storage real estate joint ventures | RealEstateVenture | 3 |  |  |  |  |  |  |  |  |  |
Number of development joint venture properties | RealEstateVenture |  |  |  |  |  |  |  |  |  | 1 |
Number of development real estate properties | RealEstateVenture |  |  |  |  |  |  |  |  |  | 2 |
SSGT II Merger Agreement | CALIFORNIA |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of land parcel developed into self storage facility | Landparcel |  |  | 1 |  |  |  |  |  |  |  |
Acquisition of Self Storage Facility |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net rentable area, primarily self storage space | ft² |  |  | 853,900 |  |  |  |  |  |  |  |
Sacramento II, CA |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  | $ 25,400,000 |  |  |  |  |  |
Occupancy percentage |  |  |  |  | 90.30% |  |  |  |  |  |
St. Johns Property |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | $ 16,300,000 |  |  |  |  |  |  |
Occupancy percentage |  |  |  | 94.60% |  |  |  |  |  |  |
Aurora Property |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | $ 12,000,000.0 |  |  |  |  |  |  |  |  |
Occupancy percentage |  | 82.20% |  |  |  |  |  |  |  |  |
SST IV Common Stock |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of right to receive shares, description |  |  |  |  |  |  |  |  | converted into the right to receive 2.1875 Class A Shares |  |
Class A Common stock |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.001 | $ 0.001
Class A Common stock | Strategic Storage Trust IV, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  |  |  |  |  |  |  |  | $ 23,100,000 |  |
Class A Common stock | SSGT II Merger Agreement |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  |  | $ 11,500,000 |  |  |  |  |  |  |  |

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