v3.25.2
Organization - Additional Information (Detail)
 1 Months Ended 6 Months Ended
Jan. 27, 2025
USD ($)
Jul. 31, 2024
USD ($)
Jul. 10, 2019
USD ($)
May 01, 2018
USD ($)
shares
Sep. 28, 2017
USD ($)
shares
Jan. 27, 2017
USD ($)
shares
Oct. 05, 2016
USD ($)
shares
Oct. 04, 2016
USD ($)
shares
Jun. 30, 2019
Jun. 30, 2025
USD ($)
Property
Employee
$ / shares
shares
Organization and Nature of Operations [Line Items]                    
Date of formation of company                   Oct. 04, 2016
Number of senior housing properties | Property                   4
Number of employees | Employee                   0
Fayetteville Mortgage Loan [Member]                    
Organization and Nature of Operations [Line Items]                    
Repayment of loan | $   $ 34,500,000                
Key Bank Bridge Loan [Member]                    
Organization and Nature of Operations [Line Items]                    
Repayment of loan | $   25,400,000                
Fayetteville Property [Member]                    
Organization and Nature of Operations [Line Items]                    
Date of property sold                   Jul. 31, 2024
Sale of property | $   $ 72,250,000                
Strategic Storage Operating Partnership IV, L.P. [Member]                    
Organization and Nature of Operations [Line Items]                    
Date of formation of company                   Oct. 05, 2016
Capital contribution | $             $ 1,000      
Percentage of common units of limited partnership interest of operating partnership                   99.80%
SSSHT Property Management, LLC (Property Manager) [Member]                    
Organization and Nature of Operations [Line Items]                    
Date of formation of company                   Oct. 03, 2016
Class Y Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Estimated value per share | $ / shares                   $ 6.35
Class Z Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Estimated value per share | $ / shares                   6.35
Class A Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Estimated value per share | $ / shares                   6.35
Class T Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Estimated value per share | $ / shares                   6.35
Class W Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Estimated value per share | $ / shares                   $ 6.35
Private Offering [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued           10,700,000        
Shares issued pursuant to distribution reinvestment plan           1,000,000        
Gross proceeds from issuance of common stock | $           $ 91,500,000       $ 5,700,000
Private Offering [Member] | Class Y Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issued pursuant to distribution reinvestment plan                   10,000
Private Offering [Member] | Class Z Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issued pursuant to distribution reinvestment plan                   1,000
Private Offering [Member] | Class A Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issued pursuant to distribution reinvestment plan                   610,000
Private Offering [Member] | Class T Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issued pursuant to distribution reinvestment plan                   8,000
Private Offering [Member] | Class W Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issued pursuant to distribution reinvestment plan                   3,000
Primary Offering [Member]                    
Organization and Nature of Operations [Line Items]                    
Gross proceeds from issuance of common stock | $                   $ 17,100,000
Primary Offering [Member] | Class Y Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued                   1,100,000
Primary Offering [Member] | Class Z Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued                   165,000
Primary Offering [Member] | Class A Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued                   362,000
Primary Offering [Member] | Class T Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued                   70,000
Primary Offering [Member] | Class W Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued                   83,000
SSSHT Advisor, LLC (Advisor) [Member] | Strategic Storage Operating Partnership IV, L.P. [Member]                    
Organization and Nature of Operations [Line Items]                    
Advisor purchased a limited partnership interest in operating partnership | $         $ 199,000   $ 1,000      
Advisor acquired limited partnership interest in operating partnership, number of partnership units         25,447.57   111.11      
Capital contribution | $         $ 200,000          
Percentage of common units of limited partnership interest of operating partnership                   0.20%
SSSHT Advisor, LLC (Advisor) [Member] | Strategic Transfer Agent Services, LLC (Transfer Agent) [Member]                    
Organization and Nature of Operations [Line Items]                    
Ownership percentage                   100.00%
Transfer agent transition fee | $ $ 50,000                  
SSSHT Advisor, LLC (Advisor) [Member] | Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Number of common stock issued               111.11    
Issuance of common stock | $               $ 1,000    
Affiliate [Member] | SSSHT Property Management, LLC (Property Manager) [Member]                    
Organization and Nature of Operations [Line Items]                    
Percentage owned by affiliate                   2.50%
SmartStop Asset Management, LLC (Sponsor) [Member] | SSSHT Advisor, LLC (Advisor) [Member]                    
Organization and Nature of Operations [Line Items]                    
Percentage of economic interest owned by sponsor                 97.50%  
Percentage of voting membership interests owned by sponsor                 100.00%  
SmartStop Asset Management, LLC (Sponsor) [Member] | SSSHT Property Management, LLC (Property Manager) [Member]                    
Organization and Nature of Operations [Line Items]                    
Percentage of property management owned by sponsor                 100.00%  
SmartStop Asset Management, LLC (Sponsor) [Member] | Select Capital Corporation (Dealer Manager) [Member]                    
Organization and Nature of Operations [Line Items]                    
Dealer manager agreement termination date                   Jun. 16, 2020
Percentage of non-voting equity interest                   15.00%
Maximum [Member] | Class Y Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issuable pursuant to distribution reinvestment plan | $     $ 700,000,000              
Maximum [Member] | Class Z Common Stock [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issuable pursuant to distribution reinvestment plan | $     $ 300,000,000              
Maximum [Member] | Private Offering [Member]                    
Organization and Nature of Operations [Line Items]                    
Issuance of common stock | $           $ 100,000,000        
Maximum [Member] | Primary Offering [Member] | S-11 Registration Statement [Member]                    
Organization and Nature of Operations [Line Items]                    
Common stock shares registered for sale to public       1,000,000,000            
Maximum [Member] | Primary and Public Offering [Member] | S-11 Registration Statement [Member]                    
Organization and Nature of Operations [Line Items]                    
Shares issuable pursuant to distribution reinvestment plan | $       $ 95,000,000