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Stockholders' Equity - Summary of Stockholders' Equity (Detail) - shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Class Of Stock Disclosures [Abstract]        
Common stock, shares issued, beginning balance 12,380,657 12,451,157 12,443,057  
Common stock, shares outstanding, beginning balance 12,380,657 12,451,157 12,443,057  
Issued 5,400 4,500 8,100  
Acquired (78,900) (75,000) 0 0
Acquired, Outstanding (78,900) (75,000)    
Retired, Issued (78,900) (75,000)    
Retired 78,900 75,000    
Common stock, shares issued, ending balance 12,307,157 12,380,657 12,451,157 12,443,057
Common stock, shares outstanding, ending balance 12,307,157 12,380,657 12,451,157 12,443,057