Preferred Equity - Additional Information (Detail) - USD ($)				9 Months Ended
	May 02, 2023	May 01, 2023	Jan. 30, 2023	Sep. 30, 2023	Dec. 31, 2022	May 01, 2021	Jan. 15, 2021
Class of Stock [Line Items]
Aggregate liquidation preference				$ 153,100,000
Percentage of preferred units distribution rate, until second anniversary date of issuance			7.00%
Percentage of preferred units distribution rate, until third anniversary date of issuance			8.00%
Percentage of preferred units distribution rate until fourth anniversary date of issuance			9.00%
Percentage of preferred units distribution rate, thereafter			10.00%
Preferred units and unpaid preferred distributions				$ 15,000,000
Preferred Stock, par value				$ 0.001	$ 0.001		$ 0.001
Preferred Stock, shares authorized				200,000,000	200,000,000		200,000,000
Investor request amout after first anniversary of share issuance		$ 15,000,000
Preferred Stock, shares outstanding				0	0
Aggregate liquidation preference from initial closing				$ 150,000,000
Accumulated and unpaid distributions				$ 3,100,000
Series A Cumulative Redeemable Preferred Units
Class of Stock [Line Items]
Issuance of preferred units			600,000
Series A Cumulative Redeemable Preferred Units | Preferred Investor [Member]
Class of Stock [Line Items]
Preferred units, liquidation preference			$ 25
Capital contribution to operating partnership			$ 15,000,000
Payment of preferred investor investment fees			$ 150,000
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Stock issued	150,000,000
Investment fee paid to investor percentage		0.50%
Preferred Stock, par value		$ 1,000
Preferred Stock, shares authorized		150,000
Dividend rate percentage		8.35%
Conversion value limitation premium		$ 40,000,000
Shares issued or outstanding if converted value limited equal to premium		150,000
Preferred Stock, Convertible, Conversion Price						$ 11
Preferred stock voting right description				In addition, the affirmative vote of the holders of a majority of the outstanding shares of Series B Preferred Stock is required in certain customary circumstances, as well as other circumstances, such as (i) our real estate portfolio exceeding a leverage ratio of 60% loan-to-value, (ii) entering into certain transactions with our Chief Executive Officer as of the date of the Purchase Agreement, or any entities in which such person has a controlling interest (excluding certain self-storage real estate programs sponsored by our sponsor or us), (iii) effecting a merger (or similar) transaction with an entity whose assets are not at least 80% self storage related, (iv) entering into any line of business other than self storage and ancillary businesses, unless such ancillary business represents revenues of less than 10% of the our revenues for our last fiscal year and (v) permitting any individual other than H. Michael Schwartz to (A) serve as our Chairman or any similar role or (B) otherwise perform any of the duties typically performed by Mr. Schwartz in his capacity as Chairman as of the date of the Series B Preferred Stock Purchase Agreement.
Loan to value leverage ratio		60
Preferred Stock, shares outstanding				150,000
Series B Preferred Stock [Member] | Maximum [Member]
Class of Stock [Line Items]
Preferred stock dividend rate if not redeemed, Percentage		11.00%
Series B Preferred Stock [Member] | Minimum [Member]
Class of Stock [Line Items]
Preferred stock dividend rate if not redeemed, Percentage		0.75%
Series B Convertible Preferred Units [Member]
Class of Stock [Line Items]
Convertible preferred stock distribution rate		8.35%
Convertible preferred stock distribution rate yearly increase		0.75%
Convertible preferred stock distribution rate maximum yearly increase rate until year ten		11.00%
Convertible preferred stock distribution rate yearly increase rate after year ten		0.75%