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Preferred Stock - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 6 Months Ended
May 19, 2020
Jul. 16, 2019
Jun. 30, 2020
Dec. 31, 2019
Temporary Equity [Line Items]        
Preferred stock, quarterly dividends rate   10.00%    
Conversion price per share   $ 4.00 $ 4.00  
Series A 10% Convertible Preferred Stock        
Temporary Equity [Line Items]        
Convertible preferred stock issued/ sold   210,000    
Face value of convertible preferred stock issued   $ 210.0    
Fair value of convertible preferred stock issued   $ 200.0    
Redemption of convertible preferred stock 210,000      
Preferred stock, quarterly dividends rate     10.00% 10.00%
Aggregate redemption value of convertible preferred stock issued $ 210.0      
Accrued and unpaid dividends paid $ 2.9      
Series B 10% Convertible Preferred Stock        
Temporary Equity [Line Items]        
Convertible preferred stock issued/ sold   175,000    
Issuance of Series B Convertible Preferred Stock   $ 175.0    
Preferred stock, quarterly dividends rate     10.00% 10.00%