Organization - Additional Information (Detail)												1 Months Ended	12 Months Ended
	Jan. 27, 2025 USD ($)	Jul. 31, 2024 USD ($)	Apr. 17, 2020	Apr. 01, 2020 USD ($)	Mar. 31, 2020 shares	Jul. 10, 2019 USD ($)	May 01, 2018 USD ($) shares	Sep. 28, 2017 USD ($) shares	Jan. 27, 2017 USD ($) shares	Oct. 05, 2016 USD ($) shares	Oct. 04, 2016 USD ($) shares	Jun. 30, 2019	Dec. 31, 2024 USD ($) Employee Property $ / shares shares
Organization and Nature of Operations [Line Items]
Date of formation of company													Oct. 04, 2016
Shares issued pursuant to distribution reinvestment plan | shares					0
Number of senior housing properties | Property													4
Sale price of the property													$ 70,863,051
Repayment of loan													$ 29,500,000
Number of employees | Employee													0
Dealer manager agreement termination date			Jun. 16, 2020
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
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 price of the property		$ 72,250,000
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 | shares									10,700,000
Shares issued pursuant to distribution reinvestment plan | shares									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 | shares													10,000
Private Offering [Member] | Class Z Common Stock [Member]
Organization and Nature of Operations [Line Items]
Shares issued pursuant to distribution reinvestment plan | shares													1,000
Private Offering [Member] | Class A Common Stock [Member]
Organization and Nature of Operations [Line Items]
Shares issued pursuant to distribution reinvestment plan | shares													610,000
Private Offering [Member] | Class T Common Stock [Member]
Organization and Nature of Operations [Line Items]
Shares issued pursuant to distribution reinvestment plan | shares													8,000
Private Offering [Member] | Class W Common Stock [Member]
Organization and Nature of Operations [Line Items]
Shares issued pursuant to distribution reinvestment plan | shares													3,000
Primary Offering [Member]
Organization and Nature of Operations [Line Items]
Issuance of common stock				$ 0
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 | shares													1,100,000
Primary Offering [Member] | Class Z Common Stock [Member]
Organization and Nature of Operations [Line Items]
Number of common stock issued | shares													165,000
Primary Offering [Member] | Class A Common Stock [Member]
Organization and Nature of Operations [Line Items]
Number of common stock issued | shares													362,000
Primary Offering [Member] | Class T Common Stock [Member]
Organization and Nature of Operations [Line Items]
Number of common stock issued | shares													70,000
Primary Offering [Member] | Class W Common Stock [Member]
Organization and Nature of Operations [Line Items]
Number of common stock issued | shares													83,000
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%
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 | shares								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%
SSSHT Advisor, LLC (Advisor) [Member] | Strategic Transfer Agent Services, LLC (Transfer Agent) [Member] | Subsequent Event [Member]
Organization and Nature of Operations [Line Items]
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 | shares											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%
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 | shares							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
Minimum [Member] | Private Offering [Member]
Organization and Nature of Operations [Line Items]
Issuance of common stock									$ 1,000,000