Summary of Total Assets by Segment (Parenthetical) (Detail) - USD ($) |
Dec. 31, 2021 |
Dec. 31, 2020 |
Jun. 28, 2019 |
|---|---|---|---|
| Segment Reporting Asset Reconciling Item [Line Items] | |||
| Goodwill | $ 53,643,331 | $ 53,643,331 | $ 78,372,980 |
| Self Storage | |||
| Segment Reporting Asset Reconciling Item [Line Items] | |||
| Goodwill | 49,800,000 | 45,300,000 | |
| Accumulated impairment charges to goodwill | 0 | 0 | |
| Managed REIT Platform | |||
| Segment Reporting Asset Reconciling Item [Line Items] | |||
| Goodwill | 3,900,000 | 8,400,000 | |
| Accumulated impairment charges to goodwill | $ 24,700,000 | $ 24,700,000 |