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Segment Disclosures - Summary of Total Assets by Segment (Parenthetical) (Detail) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2020
Segment Reporting Asset Reconciling Item [Line Items]      
Goodwill $ 53,643,331 $ 53,643,331  
Self Storage      
Segment Reporting Asset Reconciling Item [Line Items]      
Goodwill 52,200,000 52,200,000  
Accumulated impairment charges to goodwill 0 0  
Managed REIT Platform      
Segment Reporting Asset Reconciling Item [Line Items]      
Goodwill $ 1,400,000 $ 1,400,000  
Accumulated impairment charges to goodwill     $ 24,700,000