Organization - Additional Information (Detail)							3 Months Ended
	Aug. 07, 2024 $ / shares shares	Nov. 01, 2023 $ / shares shares	May 01, 2023 USD ($) shares	Mar. 10, 2021 USD ($) shares	Feb. 26, 2021 USD ($)	Jan. 15, 2021 USD ($)	Mar. 31, 2025 USD ($) UnconsolidatedRealEstateVenture OperatingSelfStorageProperty $ / shares shares	Mar. 31, 2024 USD ($) shares
Organization And Nature Of Operations [Line Items]
Number of operating self storage properties owned | OperatingSelfStorageProperty							24
Percentage of non-voting economic interest owned by affiliates					10.00%		17.50%
Number of unconsolidated real estate ventures | UnconsolidatedRealEstateVenture							5
Advisor purchased initial investment in operating partnership | $							$ 202,000
Sale of Stock, Consideration Received on Transaction | $			$ 150,000,000
Issuance costs | $							805,069	$ 1,035,663
Units converted	0
Purchase Agreement
Organization And Nature Of Operations [Line Items]
Aggregate value of shares committed to purchase | $			$ 150,000,000
Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Estimated per share NAV | $ / shares	$ 10
Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 14,600,000
Class A Common Stock
Organization And Nature Of Operations [Line Items]
One time stock dividend | $ / shares		$ 0.11075
Estimated per share NAV | $ / shares	$ 10
Units converted	0	0
Class A Common Stock | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Estimated per share NAV | $ / shares		$ 10
Class A Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							200,000
Price per share | $ / shares		9.3
Class A Common Stock | Pubic Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							2,900,000
Class A Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 30,300,000
Class P Common Stock
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 100,700,000
Estimated per share NAV | $ / shares	$ 10
Class P Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							64,865
Class P Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							900,000
Price per share | $ / shares		9.3
Class P Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							10,600,000
Class T Common Stock
Organization And Nature Of Operations [Line Items]
One time stock dividend | $ / shares		0.07526
Estimated per share NAV | $ / shares	10
Class T Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							300,000
Price per share | $ / shares		9.3
Class T Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 48,100,000
Class T Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							4,800,000
Class W Common Stock
Organization And Nature Of Operations [Line Items]
One time stock dividend | $ / shares		0.01075
Estimated per share NAV | $ / shares	10
Class W Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							41,000
Price per share | $ / shares		9.3
Class W Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 6,300,000
Class W Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							700,000
Series B Convertible Preferred Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering			150,000,000
Series B Convertible Preferred Stock | Purchase Agreement
Organization And Nature Of Operations [Line Items]
Issuance costs | $			$ 1,400,000
Class Y Common Stock
Organization And Nature Of Operations [Line Items]
Price per share | $ / shares		9.3
Estimated per share NAV | $ / shares	10
Class Y Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							627,757	1,054,322
Class Y Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							100,000
Class Y Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 44,200,000
Class Y Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							4,600,000
Class Z Common Stock
Organization And Nature Of Operations [Line Items]
Price per share | $ / shares		9.3
Estimated per share NAV | $ / shares	$ 10
Class Z Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							41,250	83,978
Class Z Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							4,600
Class Z Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $							$ 3,700,000
Class Z Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							400,000
Class Y Shares and Class Z Shares | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Price per share | $ / shares		$ 9.3					$ 10
Strategic Storage Advisor IV, LLC
Organization And Nature Of Operations [Line Items]
Sale of common shares to advisor | $						$ 1,000
Advisor purchased initial investment in operating partnership | $						$ 1,000
Smartstop Storage Advisors LLC.
Organization And Nature Of Operations [Line Items]
Investment by affiliate in exchange for additional limited partnership interests | $					$ 1,000
Smartstop OP, L.P
Organization And Nature Of Operations [Line Items]
Equity ownership percentage							2.00%
Advisor purchased a limited partnership interest in Operating Partnership, number of partnership units				549,451
Initial capital contribution | $				$ 5,000,000
Strategic Storage Operating Partnership VI, L.P.
Organization And Nature Of Operations [Line Items]
Equity ownership percentage							98.00%
SmartCentres
Organization And Nature Of Operations [Line Items]
Equity ownership percentage							50.00%