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Stockholders' Equity - Summary of Stockholders' Equity (Detail) - shares
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Class Of Stock [Line Items]          
Common stock, shares issued, beginning balance   12,451,157 12,451,157 12,443,057 12,435,557
Common stock, shares outstanding, beginning balance   12,451,157 12,451,157 12,443,057 12,435,557
Issued     4,500 8,100 7,500
Acquired     (75,000) 0 0
Acquired, Outstanding     (75,000)    
Retired, Issued     (75,000)    
Retired     75,000    
Common stock, shares issued, ending balance 12,380,657   12,380,657 12,451,157 12,443,057
Common stock, shares outstanding, ending balance 12,380,657   12,380,657 12,451,157 12,443,057
Class A Common Stock          
Class Of Stock [Line Items]          
Common stock, shares issued, beginning balance   12,451,157 12,451,157    
Common stock, shares outstanding, beginning balance   12,380,657 12,380,657    
Acquired, Outstanding (25,000) (50,000) (75,000)    
Common stock, shares issued, ending balance 12,451,157   12,451,157 12,451,157  
Common stock, shares outstanding, ending balance 12,380,657   12,380,657 12,380,657