Organization - Additional Information (Detail)							3 Months Ended				6 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 ($)	Jan. 15, 2021 USD ($)	Jun. 30, 2025 UnconsolidatedRealEstateVenture OperatingSelfStorageProperty $ / shares shares	Mar. 31, 2025 shares	Jun. 30, 2024 shares	Mar. 31, 2024 shares	Jun. 30, 2025 USD ($) UnconsolidatedRealEstateVenture OperatingSelfStorageProperty $ / shares shares	Jun. 30, 2024 USD ($)
Organization And Nature Of Operations [Line Items]
Number of operating self storage properties owned | OperatingSelfStorageProperty							24				24
Number of unconsolidated real estate ventures | UnconsolidatedRealEstateVenture							5				5
Advisor purchased initial investment in operating partnership | $											$ 202,000
Sale of Stock, Consideration Received on Transaction | $			$ 150,000,000
Issuance costs | $											1,809,770	$ 1,929,609
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 | $											$ 16,300,000
Distribution reinvestment plan termination notice period											10 days
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											1,000,000
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											46,000
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							611,712	627,757	856,277	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 | $											$ 50,400,000
Class Y Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											5,200,000
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							180,800	41,250	35,806	83,978
Class Z Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											6,000
Class Z Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $											$ 5,500,000
Class Z Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											600,000
Class Y Shares and Class Z Shares | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Price per share | $ / shares		$ 9.3					$ 10				$ 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%				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%				98.00%
SmartCentres
Organization And Nature Of Operations [Line Items]
Equity ownership percentage							50.00%				50.00%