Preferred Equity - Additional Information (Detail) - USD ($)			9 Months Ended
	Sep. 04, 2025	May 01, 2023	Sep. 30, 2025	Dec. 31, 2024	Jan. 15, 2021
Class of Stock [Line Items]
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
Preferred stock outstanding			0	0
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, par value		$ 1,000
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]
Preferred stock voting right description			In addition, the affirmative vote of the holders of a majority of the outstanding shares of Series B Convertible 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 Purchase Agreement.
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%
Series B Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Gross proceeds from issuance of common stock (in shares)		150,000,000
Investment fee paid to investor percentage		0.50%
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
Loan to value leverage ratio		60
Preferred Stock, shares outstanding			150,000
Aggregate liquidation preference			$ 153,200,000
Aggregate liquidation preference from initial closing			150,000,000
Accumulated and unpaid distributions			$ 3,200,000
Preferred stock outstanding			150,000
Series D Cumulative Redeemable Preferred Units [Member]
Class of Stock [Line Items]
Issuance of preferred units			1,000,000
Preferred units, liquidation preference			$ 25
Gross proceeds from issuance of common stock (in shares)			1,000,000
Preferred Stock, par value	$ 25
Preferred Stock, shares authorized	1,400,000
Convertible preferred stock distribution rate second year	6.00%
Convertible preferred stock distribution rate third year	7.00%
Convertible preferred stock distribution rate fourth year	8.00%
Convertible preferred stock distribution rate thereafter	9.00%
Preferred Stock, shares outstanding			1
Aggregate liquidation preference	$ 25		$ 25,100,000
Aggregate liquidation preference from initial closing			25,000,000
Accumulated and unpaid distributions			$ 100,000
Optional repurchase event period	90 days
Preferred stock outstanding			1
Series D Cumulative Redeemable Preferred Units [Member] | Maximum [Member]
Class of Stock [Line Items]
Consideration	$ 35,000,000		$ 25,000,000
Series D Cumulative Redeemable Preferred Units [Member] | Preferred Investor [Member]
Class of Stock [Line Items]
Payment of preferred investor investment fees	$ 250,000
Series E Preferred Offering [Member]
Class of Stock [Line Items]
Preferred Stock, par value			$ 0.001
Dividend rate percentage			8.00%
Preferred Stock, shares outstanding			0
Aggregate liquidation preference			$ 10
Preferred stock offering price			$ 10
Redemption percentage			100.00%
Preferred Stock, Voting Rights			The holders of Series E Preferred Stock are not entitled to vote on any matter submitted to a vote of our stockholders.
Preferred stock outstanding			0
Series E Preferred Offering [Member] | Maximum [Member]
Class of Stock [Line Items]
Preferred stock, value authorized			$ 75,000,000
Preferred stock, value authorized expandable			$ 100,000,000
Percentage of redemption fee range			0.00%
Redemption percentage			5.00%
Series E Preferred Offering [Member] | Minimum [Member]
Class of Stock [Line Items]
Percentage of redemption fee range			10.00%