Organization - Additional Information (Detail)									12 Months Ended
	Mar. 25, 2024 shares	Nov. 01, 2023 $ / shares shares	May 02, 2023 USD ($) shares	May 01, 2023 USD ($)	Jan. 30, 2023 USD ($) $ / shares shares	Mar. 10, 2021 USD ($) shares	Feb. 26, 2021 USD ($)	Jan. 15, 2021 USD ($)	Dec. 31, 2023 USD ($) OperatingSelfStorageProperty UnconsolidatedRealEstateVenture shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) 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%
Number of unconsolidated real estate ventures | UnconsolidatedRealEstateVenture									4
Advisor purchased initial investment in operating partnership | $									$ 202,000
Sale of Stock, Consideration Received on Transaction | $				$ 150,000,000
Issuance costs | $									4,387,423	$ 9,226,517	$ 5,916,858
Purchase Agreement
Organization And Nature Of Operations [Line Items]
Aggregate value of shares committed to purchase | $				150,000,000
Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $									$ 7,300,000
Class A Common Stock
Organization And Nature Of Operations [Line Items]
One time stock dividend | $ / shares		$ 0.11075
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 | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Net asset value per share | $ / shares		10
Class A Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									1,180,172	1,755,190
Class A Common Stock | Series C Units
Organization And Nature Of Operations [Line Items]
Conversion of units | $ / shares		10
Class A Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									65,500
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
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 | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering										5,539,950	5,026,902
Class P Common Stock | Series C Units
Organization And Nature Of Operations [Line Items]
Conversion of units | $ / shares		10
Class P Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									600,000
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
Class T Common Stock | Subsequent Event
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering	5,300,000
Class T Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									1,812,471	2,998,808
Class T Common Stock | Series C Units
Organization And Nature Of Operations [Line Items]
Conversion of units | $ / shares		10
Class T Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									112,500
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
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									418,085	246,436
Class W Common Stock | Series C Units
Organization And Nature Of Operations [Line Items]
Conversion of units | $ / shares		10
Class W Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									16,000
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]
Reclassification of shares		200,000,000
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	1,400,000
Class Y Common Stock | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Percentage of upfront sales commission		3.00%
Percentage of upfront dealer manager fee		3.00%
Class Y Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									382,653
Class Y Common Stock | Series C Units
Organization And Nature Of Operations [Line Items]
Conversion of units | $ / shares		$ 10
Class Y Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $									$ 3,600,000
Class Y Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									400,000
Class Z Common Stock
Organization And Nature Of Operations [Line Items]
Reclassification of shares		70,000,000
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	100,000
Class Z Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									36,559
Class Z Common Stock | Series C Units
Organization And Nature Of Operations [Line Items]
Conversion of units | $ / shares		10
Class Z Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									0
Class Z Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $									$ 300,000
Class Z Common Stock | Private Offering | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									100,000
Class Y Shares and Class Z Shares | Sponsor Funding Agreement
Organization And Nature Of Operations [Line Items]
Price per share | $ / shares		$ 9.3
Percentage of organization and offering expenses		1.00%
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
Preferred Investor | Series A Cumulative Redeemable Preferred Units
Organization And Nature Of Operations [Line Items]
Capital contribution to operating partnership | $					$ 15,000,000
Preferred units, liquidation preference | $ / shares					$ 25
Smartstop OP L P [Member]
Organization And Nature Of Operations [Line Items]
Equity ownership percentage									3.00%
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									97.00%
SmartCentres
Organization And Nature Of Operations [Line Items]
Equity ownership percentage									50.00%