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Stockholders' Equity - Additional Information - Deferred Stock Units (Detail) - Deferred Stock Units [Member] - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Sep. 01, 2019
Schedule Of Stockholders Equity [Line Items]        
Number of stock unit received       1
Deferred stock units 1,507 2,845    
Compensation expense related to grants $ 54,212 $ 79,768    
DSUs outstanding 199,652   198,145  
Director [Member]        
Schedule Of Stockholders Equity [Line Items]        
Compensation expense related to grants $ 9,638 $ 8,661    
Executive Employees [Member]        
Schedule Of Stockholders Equity [Line Items]        
Deferred stock units   13,333