Schedule III Summary of Activity in Real Estate Facilities (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Real estate facilities        
Real estate facilities, Balance at beginning of year $ 1,210,102,582 $ 1,210,102,582 $ 1,173,825,368 $ 820,296,026
Facility acquisitions 371,507,610 47,162,974   351,070,238
Impact of foreign exchange rate changes   (138,457) 4,147,798 6,582,603
Improvements and additions   12,151,893 32,129,416 7,565,494
Other facility acquisitions [1]   15,689,143    
Asset disposals       (11,688,993)
Disposition due to deconsolidation   (15,689,143)    
Real estate facilities, Balance at end of year   1,593,623,628 1,210,102,582 1,173,825,368
Accumulated depreciation        
Accumulated depreciation, beginning balance (115,903,045) (115,903,045) (83,692,491) (54,264,685)
Asset disposals       202,416
Depreciation expense   (40,158,233) (31,711,102) (29,188,668)
Disposition due to deconsolidation   62,466    
Impact of foreign exchange rate changes   71,937 (499,452) (441,554)
Accumulated depreciation, ending balance   (155,926,875) (115,903,045) (83,692,491)
Construction in process        
Construction in process, Balance at beginning of year 1,761,303 1,761,303 12,237,722 130,383
Net additions and assets placed into service $ 37,701   (10,476,419) 12,107,339
Construction in process, Balance at end of year   1,799,004 1,761,303 12,237,722
Real estate facilities, net   $ 1,439,495,757 $ 1,095,960,840 $ 1,102,370,599
[1] Such activity represents the acquisition of a property completed by SST VI OP, which as of the acquisition date was consolidated within our consolidated financial statements. On May 1, 2021, we deconsolidated SST VI OP as we were no longer the primary beneficiary, which resulted in the removal of such facility from our consolidated balance sheet. Our investment in SST VI OP is now included within “Investments in and advances to managed REITs” within our consolidated balance sheet.