Organization - Additional Information (Detail)									3 Months Ended						9 Months Ended
	Nov. 07, 2024 shares	Aug. 07, 2024 $ / shares shares	Nov. 01, 2023 $ / shares shares	May 01, 2023 USD ($) shares	Jan. 30, 2023 USD ($) $ / shares shares	Mar. 10, 2021 USD ($) shares	Feb. 26, 2021 USD ($)	Jan. 15, 2021 USD ($)	Sep. 30, 2024 UnconsolidatedRealEstateVenture OperatingSelfStorageProperty $ / shares shares	Jun. 30, 2024 shares	Mar. 31, 2024 shares	Sep. 30, 2023 shares	Jun. 30, 2023 shares	Mar. 31, 2023 shares	Sep. 30, 2024 USD ($) UnconsolidatedRealEstateVenture OperatingSelfStorageProperty $ / shares shares	Sep. 30, 2023 USD ($)	May 02, 2023 USD ($)
Organization And Nature Of Operations [Line Items]
Units converted		0
Number of operating self storage properties owned | OperatingSelfStorageProperty									24						24
Percentage of non-voting economic interest owned by affiliates							10.00%								17.50%
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 | $															2,699,312	$ 2,989,811
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 | $															$ 11,500,000
Class A Common Stock
Organization And Nature Of Operations [Line Items]
Estimated per share NAV | $ / shares		$ 10
Units converted		0	0
One time stock dividend | $ / shares			$ 0.11075
Class A Common Stock | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Estimated per share NAV | $ / shares			10
Class A Common Stock | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	3,400,000
Class A Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering												179,988	270,715	294,558
Class A Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering															100,000
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 | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	11,200,000
Class P Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering															800,000
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]
Estimated per share NAV | $ / shares		10
One time stock dividend | $ / shares			0.07526
Class T Common Stock | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	5,400,000
Class T Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering												442,210	481,581	673,565
Class T 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 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]
Estimated per share NAV | $ / shares		10
One time stock dividend | $ / shares			0.01075
Class W Common Stock | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	700,000
Class W Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering												59,574	126,596	140,638
Class W Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering															31,000
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 A Cumulative Redeemable Preferred Units
Organization And Nature Of Operations [Line Items]
Issuance of preferred units					600,000
Series A Cumulative Redeemable Preferred Units | Preferred Unit Purchase Agreement
Organization And Nature Of Operations [Line Items]
Issuance of preferred units					600,000
Preferred units, liquidation preference | $ / shares					$ 25
Capital contribution to operating partnership | $					$ 15,000,000
Preferred stock redemption amount | $																	$ 15,000,000
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]
Estimated per share NAV | $ / shares		10
Price per share | $ / shares			9.3
Class Y Common Stock | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	3,500,000
Class Y Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									837,836	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															38,000
Class Y Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $															$ 29,400,000
Class Y Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering															3,100,000
Class Z Common Stock
Organization And Nature Of Operations [Line Items]
Estimated per share NAV | $ / shares		$ 10
Price per share | $ / shares			9.3
Class Z Common Stock | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	300,000
Class Z Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									86,933	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															2,100
Class Z Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $															$ 2,300,000
Class Z Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering															300,000
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%