Organization - Additional Information (Detail)							3 Months Ended				6 Months Ended
	May 01, 2023 USD ($)	Jan. 30, 2023 USD ($) $ / shares shares	May 28, 2021 USD ($)	Mar. 10, 2021 USD ($) shares	Feb. 26, 2021 USD ($)	Jan. 15, 2021 USD ($) $ / shares shares	Jun. 30, 2023 UnconsolidatedRealEstateVenture Employee OperatingSelfStorageProperty $ / shares shares	Mar. 31, 2023 shares	Jun. 30, 2022 shares	Mar. 31, 2022 shares	Jun. 30, 2023 USD ($) UnconsolidatedRealEstateVenture Employee OperatingSelfStorageProperty $ / shares shares	Jun. 30, 2022 USD ($)	May 02, 2023 USD ($)	Dec. 31, 2022 $ / shares shares
Organization And Nature Of Operations [Line Items]
Date of formation of company											Oct. 14, 2020
Number of employees | Employee							0				0
Preferred Stock, shares authorized						200,000,000	200,000,000				200,000,000			200,000,000
Preferred Stock, par value | $ / shares						$ 0.001	$ 0.001				$ 0.001			$ 0.001
Shares issuable pursuant to distribution reinvestment plan | $					$ 20,000,000
Number of operating self storage properties owned | OperatingSelfStorageProperty							24				24
Percentage of non-voting economic interest owned by affiliates											10.00%
Number of unconsolidated real estate ventures | UnconsolidatedRealEstateVenture							3				3
Advisor purchased initial investment in operating partnership | $											$ 202,000
Sale of Stock, Consideration Received on Transaction | $	$ 150,000,000
Issuance costs | $											1,929,766	$ 6,193,648
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 | $											$ 4,900,000
Maximum
Organization And Nature Of Operations [Line Items]
Common stock, value authorized | $					200,000,000
Class A Common Stock
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized							300,000,000				300,000,000			300,000,000
Common Stock, par value | $ / shares							$ 0.001				$ 0.001			$ 0.001
Class A Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							270,715	294,558	572,182
Class A Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											32,500
Class A Common Stock | Primary Offering | Maximum
Organization And Nature Of Operations [Line Items]
Common stock, value authorized | $			$ 1,000,000,000
Class A Common Stock | Pubic Offering
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized						300,000,000
Shares issuable pursuant to distribution reinvestment plan | $			95,000,000
Gross proceeds from issuance of common stock | $											$ 23,900,000
Common stock issued in connection with offering											2,300,000
Class P Common Stock
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized							30,000,000				30,000,000			30,000,000
Common Stock, par value | $ / shares							$ 0.001				$ 0.001			$ 0.001
Class P Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering									109,890	5,430,060
Class P Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											400,000
Class P Common Stock | Pubic Offering
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized						30,000,000
Class P Common Stock | Private Offering
Organization And Nature Of Operations [Line Items]
Gross proceeds from issuance of common stock | $											$ 100,700,000
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]
Common Stock, shares authorized							300,000,000				300,000,000			300,000,000
Common Stock, par value | $ / shares							$ 0.001				$ 0.001			$ 0.001
Class T Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							481,581	673,565	668,360
Class T Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											56,300
Class T Common Stock | Primary Offering | Maximum
Organization And Nature Of Operations [Line Items]
Common stock, value authorized | $			1,000,000,000
Class T Common Stock | Pubic Offering
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized						300,000,000
Shares issuable pursuant to distribution reinvestment plan | $			95,000,000
Gross proceeds from issuance of common stock | $											$ 41,500,000
Common stock issued in connection with offering											4,200,000
Class W Common Stock
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized							70,000,000				70,000,000			70,000,000
Common Stock, par value | $ / shares							$ 0.001				$ 0.001			$ 0.001
Class W Common Stock | Common Stock
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering							126,596	140,638	86,436
Class W Common Stock | Distribution Reinvestment Plan
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with offering											7,500
Class W Common Stock | Primary Offering | Maximum
Organization And Nature Of Operations [Line Items]
Common stock, value authorized | $			1,000,000,000
Class W Common Stock | Pubic Offering
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized						70,000,000
Shares issuable pursuant to distribution reinvestment plan | $			$ 95,000,000
Gross proceeds from issuance of common stock | $											$ 4,800,000
Common stock issued in connection with offering											500,000
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 | Purchase Agreement
Organization And Nature Of Operations [Line Items]
Issuance costs | $	$ 1,400,000
Articles of Incorporation
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized						30,000
Common Stock, par value | $ / shares						$ 0.001
Articles of Amendment and Restatement
Organization And Nature Of Operations [Line Items]
Common Stock, shares authorized						700,000,000
Common Stock, par value | $ / shares						$ 0.001
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
Strategic Storage Advisor IV, LLC | Class A Common Stock
Organization And Nature Of Operations [Line Items]
Number of shares sold to advisor						110
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							3.00%				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%				97.00%
SmartCentres
Organization And Nature Of Operations [Line Items]
Equity ownership percentage							50.00%				50.00%
SmartStop REIT Advisors, LLC | Strategic Storage Advisor IV, LLC
Organization And Nature Of Operations [Line Items]
Percentage of economic interests owned by sponsor											90.00%
Percentage of voting membership interests owned by sponsor							100.00%				100.00%
SmartStop REIT Advisors, LLC | Strategic Storage Property Management VI, LLC
Organization And Nature Of Operations [Line Items]
Percentage of Property Management owned by sponsor											100.00%