Consolidated Statements of Equity - USD ($)
Total
SST VI OP
SSGT Mergers
Self Administration Transaction
Common Stock
Class A Common stock
Common Stock
Class T Common stock
Additional Paid-in Capital
Distributions
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Total SmartStop Self Storage REIT, Inc. Equity
Noncontrolling Interests
Noncontrolling Interests
SST VI OP
Noncontrolling Interests
SSGT Mergers
Noncontrolling Interests
Self Administration Transaction
Preferred Stock
Redeemable Common Stock
Beginning Balance at Dec. 31, 2018 $ 345,256,897       $ 50,437 $ 7,534 $ 500,474,807 $ (94,248,326) $ (62,340,153) $ 1,390,354 $ 345,334,653 $ (77,756)         $ 32,226,815
Beginning Balance (in shares) at Dec. 31, 2018         50,437,059 7,533,790                      
Offering costs (42,039)           (42,039)       (42,039)            
Issuance of preferred stock                               $ 150,000,000  
Preferred stock issuance costs                               (3,573,836)  
Issuance of limited partnership units in our Operating Partnership in connection with the SSGT Mergers/Self Administration Transaction     $ 4,217,399 $ 63,643,000                   $ 4,217,399 $ 63,643,000    
Issuance of limited partnership units in our Operating Partnership in exchange for special limited partnership interest 18,800,000           9,687,035       9,687,035 9,112,965          
Contribution of special limited partnership interest in exchange for limited partnership interests in our Operating Partnership (18,800,000)           (18,800,000)       (18,800,000)            
Noncontrolling interests related to the consolidated Tenant Protection Programs joint ventures 21,800                     21,800          
Redemption of limited partnership interests held by our Former Advisor (200,000)           (291,103)       (291,103) 91,103          
Changes to redeemable common stock (16,045,030)           (16,045,030)       (16,045,030)           16,046,535
Redemptions of common stock (592)       $ (557) $ (35)         (592)           (4,881,988)
Redemptions of common stock (in shares)         (556,575) (35,079)                      
Issuance of restricted stock 252       $ 252           252            
Issuance of restricted stock (in shares)         251,993                        
Distributions (34,394,461)             (34,394,461)     (34,394,461)            
Distributions to noncontrolling interests (2,902,654)                     (2,902,654)          
Issuance of shares for distribution reinvestment plan 16,046,534       $ 1,303 $ 201 16,045,030       16,046,534            
Issuance of shares for distribution reinvestment plan (in shares)         1,302,647 201,182                      
Equity based compensation expense 404,540           404,540       404,540            
Net loss attributable to SmartStop Self Storage REIT, Inc. common stockholders (24,750,333)               (24,750,333)   (24,750,333)            
Net loss attributable to the noncontrolling interests in our Operating Partnership (2,010,959)                     (2,010,959)          
Foreign currency translation adjustment 2,371,517                 2,311,488 2,311,488 60,029          
Foreign currency forward contract gain (loss) (3,226,682)                 (3,030,727) (3,030,727) (195,955)          
Interest rate swap and cap contract gains (losses) (2,575,366)                 (2,626,450) (2,626,450) 51,084          
Ending Balance at Dec. 31, 2019 345,813,823       $ 51,435 $ 7,700 491,433,240 (128,642,787) (87,090,486) (1,955,335) 273,803,767 72,010,056       146,426,164 43,391,362
Ending Balance (in shares) at Dec. 31, 2019         51,435,124 7,699,893                      
Offering costs (46,907)           (46,907)       (46,907)            
Issuance of preferred stock                               50,000,000  
Preferred stock issuance costs                               (70,057)  
Changes to redeemable common stock (15,954,081)           (15,954,081)       (15,954,081)           15,954,081
Redemptions of common stock (165)       $ (165)           (165)           (2,009,868)
Redemptions of common stock (in shares)         (164,894)                        
Issuance of restricted stock 72       $ 72           72            
Issuance of restricted stock (in shares)         71,567                        
Distributions (35,310,382)             (35,310,382)     (35,310,382)            
Distributions to noncontrolling interests (5,525,293)                     (5,525,293)          
Issuance of shares for distribution reinvestment plan 15,954,081       $ 1,319 $ 204 15,952,558       15,954,081            
Issuance of shares for distribution reinvestment plan (in shares)         1,318,605 204,018                      
Equity based compensation expense 1,738,873           1,023,196       1,023,196 715,677          
Net loss attributable to SmartStop Self Storage REIT, Inc. common stockholders (54,354,394)               (54,354,394)   (54,354,394)            
Net loss attributable to the noncontrolling interests in our Operating Partnership (6,901,931)                     (6,901,931)          
Foreign currency translation adjustment 965,103                 845,698 845,698 119,405          
Foreign currency forward contract gain (loss) (596,969)                 (525,540) (525,540) (71,429)          
Interest rate swap and cap contract gains (losses) (2,541,625)                 (2,199,051) (2,199,051) (342,574)          
Ending Balance at Dec. 31, 2020 243,240,205       $ 52,661 $ 7,904 492,408,006 (163,953,169) (141,444,880) (3,834,228) 183,236,294 60,003,911       196,356,107 57,335,575
Ending Balance (in shares) at Dec. 31, 2020         52,660,402 7,903,911                      
Gross proceeds from issuance of operating partnership units in SST VI OP   $ 4,761,315                     $ 4,761,315        
Issuance of common stock in connection with SST IV Merger 231,412,470       $ 23,138   231,389,332       231,412,470            
Issuance of common stock in connection with SST IV Merger (in shares)         23,137,540                        
Issuance of Class A-1 Units in our Operating Partnership in connection with the contingent earnout related to the Self Administration Transaction       $ 11,219,744                     $ 11,219,744    
Acquisition of noncontrolling interest related to the Tenant Protection Programs joint ventures (10,900)                     (10,900)          
Offering costs (335,175) (1,239,194)         (335,175)       (335,175)   (1,239,194)        
Changes to redeemable common stock (19,564,929)           (19,564,929)       (19,564,929)           19,564,929
Redemptions of common stock (390)       $ (360) $ (30)         (390)           (5,565,829)
Redemptions of common stock (in shares)         (359,976) (30,158)                      
Issuance of restricted stock 78       $ 78           78            
Issuance of restricted stock (in shares)         78,192                        
Distributions (47,011,295)             (47,011,295)     (47,011,295)            
Distributions to noncontrolling interests (6,338,488)                     (6,338,488)          
Issuance of shares for distribution reinvestment plan 19,564,929       $ 1,541 $ 182 19,563,206       19,564,929            
Issuance of shares for distribution reinvestment plan (in shares)         1,541,585 182,445                      
Equity based compensation expense 2,907,808           1,279,432       1,279,432 1,628,376          
Net loss attributable to SmartStop Self Storage REIT, Inc. common stockholders (29,401,595)               (29,401,595)   (29,401,595)            
Deconsolidation of SST VI OP   $ (3,170,238)                     $ (3,170,238)        
Net loss attributable to the noncontrolling interests in our Operating Partnership (2,663,123)                     (2,663,123)          
Foreign currency translation adjustment 65,261                 47,424 47,424 17,837          
Foreign currency forward contract gain (loss) (394,417)                 (337,219) (337,219) (57,198)          
Interest rate swap and cap contract gains (losses) 4,335,323                 3,844,048 3,844,048 491,275          
Ending Balance at Dec. 31, 2021 $ 407,377,389       $ 77,058 $ 8,056 $ 724,739,872 $ (210,964,464) $ (170,846,475) $ (279,975) $ 342,734,072 $ 64,643,317       $ 196,356,107 $ 71,334,675
Ending Balance (in shares) at Dec. 31, 2021         77,057,743 8,056,198