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Non-Redeemable Preferred Stock - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Preferred Stock [Line Items]      
Dividends on convertible preferred stocks $ 298 $ 300 $ 300
Series B and Series D Preferred Stock [Member]      
Preferred Stock [Line Items]      
Preferred stock converted into shares of common stock 1,200,000    
Dividends on convertible preferred stocks $ 1,900    
Preferred stock, shares outstanding 0    
Series B Preferred Stock [Member]      
Preferred Stock [Line Items]      
Preferred stock cumulative dividend rate 12.00% 12.00%  
Series B cumulative, convertible preferred stock, par value $ 100 $ 100  
Dividends on convertible preferred stocks $ 239 $ 240 240
Preferred stock, shares outstanding 0 20,000  
Shares of authorized additional preferred stock 250,000    
Series D Preferred Stock [Member]      
Preferred Stock [Line Items]      
Preferred stock cumulative dividend rate 6.00% 6.00%  
Series D cumulative, convertible Class C preferred stock, par value  
Dividends on convertible preferred stocks $ 59 $ 60 $ 60
Preferred stock, shares outstanding 0 1,000,000  
Shares of authorized additional preferred stock 5,000,000