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Line of Credit - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Line Of Credit Facility [Line Items]    
Revolving line of credit, permitted $ 25,000,000  
Line of credit, maturity date Jun. 30, 2023  
Term facility payable (in years) five  
Percentage of restricted dividend payments 55.00%  
Line of credit $ 0 $ 0
Minimum [Member]    
Line Of Credit Facility [Line Items]    
Percentage of stock dividend declared 36.00%  
Maximum [Member]    
Line Of Credit Facility [Line Items]    
Percentage of stock dividend declared   53.00%