Subsequent Events - Additional Information (Detail) $ / shares in Units, $ in Millions							12 Months Ended
		Mar. 17, 2023 USD ($) shares	Feb. 21, 2023 CAD ($)	Feb. 16, 2023 USD ($)	Jan. 31, 2023 USD ($)	Jan. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Subsequent Event [Line Items]
Events of default, description							(i) a material default in the performance of, or material breach of any covenant, warranty or other agreement contained in the Second Amended and Restated Limited Partnership Agreement, the Amendment or the Unit Purchase Agreement by us or the Operating Partnership, as applicable, and the continuance of such default or breach for a period of 10 business days after written notice is given to us and the Operating Partnership; (b) an Event of Bankruptcy as to us, the Operating Partnership or any of our or its subsidiaries that has not been consented to in advance by the holders of the Preferred Units; (c) any breach or default or event of default that occurs under any instrument, agreement or indenture pertaining to any indebtedness of us or the Operating Partnership or any of our or its subsidiaries aggregating more than $5 million, the effect of which is to cause an acceleration, mandatory redemption or other required repurchase of such indebtedness or such indebtedness is otherwise declared to be due and payable or required to be prepaid, redeemed, or otherwise repurchased by us or the Operating Partnership or any such subsidiary prior to maturity thereof; and (d) our failure to qualify as a REIT under the Code.
Gross proceeds from issuance of common stock							$ 103,913,984	$ 47,427,658
CDOR | Interest Rate Swap Agreement
Subsequent Event [Line Items]
Notional amount	[1]						$ 16,500,000
Subsequent Event
Subsequent Event [Line Items]
Percentage of preferred units distribution rate, until second anniversary date of issuance						7.00%
Percentage of preferred units distribution rate, until third anniversary date of issuance						8.00%
Percentage of preferred units distribution rate, until fourth anniversary date of issuance						9.00%
Percentage of preferred units distribution rate, thereafter						10.00%
Subsequent Event | Series A Cumulative Redeemable Preferred Units | Preferred Investor
Subsequent Event [Line Items]
Issuance of preferred units | shares						600,000
Preferred units, liquidation preference | $ / shares						$ 25.00
Capital contribution to operating partnership						$ 15,000,000
Payment of preferred investor investment fees						$ 150,000
Subsequent Event | Class P Common Stock
Subsequent Event [Line Items]
Common stock issued in connection with offering | shares		10,900,000
Gross proceeds from issuance of common stock		$ 104,000,000.0
Subsequent Event | Class A Common Stock
Subsequent Event [Line Items]
Common stock issued in connection with offering | shares		2,000,000.0
Gross proceeds from issuance of common stock		$ 20,900,000
Subsequent Event | Class T Common Stock
Subsequent Event [Line Items]
Common stock issued in connection with offering | shares		3,600,000
Gross proceeds from issuance of common stock		$ 36,100,000
Subsequent Event | Class W Common Stock
Subsequent Event [Line Items]
Common stock issued in connection with offering | shares		400,000
Gross proceeds from issuance of common stock		$ 3,500,000
Subsequent Event | Dorval Land [Member]
Subsequent Event [Line Items]
Percentage of units to be subscribed at closing in limited partnership			50.00%
Subsequent Event | Acquisition of Edmonton Property | SmartStop Delayed Draw Mezzanine Loan Agreement
Subsequent Event [Line Items]
Purchase price					$ 15,000,000.0
Line of credit facility, amount borrowed					15,000,000.0
Subsequent Event | Acquisition of North York Property
Subsequent Event [Line Items]
Purchase price					50,500,000
Subsequent Event | Acquisition of North York Property | National Bank of Canada Loan
Subsequent Event [Line Items]
Term loan					25,000,000.0
Subsequent Event | Acquisition of North York Property | National Bank of Canada Loan | Interest Rate Swap Agreement
Subsequent Event [Line Items]
Notional amount					$ 25,000,000.0
Debt instrument, initial term					2 years
Debt instrument maturity date					Jan. 31, 2025
Debt instrument, frequency of payment					monthly
Debt instrument amortization period					25 years
Subsequent Event | Acquisition of North York Property | National Bank of Canada Loan | CDOR
Subsequent Event [Line Items]
Interest rate term					P1M
Debt instrument variable interest rate					2.40%
Subsequent Event | Acquisition of North York Property | National Bank of Canada Loan | CDOR | Interest Rate Swap Agreement
Subsequent Event [Line Items]
Applicable interest rate					3.79%
Subsequent Event | Acquisition of Bradenton Expansion Land
Subsequent Event [Line Items]
Purchase price				$ 1,400,000
Subsequent Event | Acquisition of Dorval Property
Subsequent Event [Line Items]
Percentage of units to be subscribed at closing in limited partnership			50.00%
Subscription price of units in limited partnership			$ 3.0
Subsequent Event | Acquisition of Dorval Property | Dorval Land [Member]
Subsequent Event [Line Items]
Percentage owned by general partner in the limited partnership			50.00%

[1] Notional amounts are denominated in CAD and have been designated as a cash flow hedge.