Annual report pursuant to Section 13 and 15(d)

EQUITY AND EARNINGS PER SHARE - Narrative (Details)

v3.20.4
EQUITY AND EARNINGS PER SHARE - Narrative (Details)
 1 Months Ended 12 Months Ended
Feb. 22, 2021
USD ($)
Feb. 02, 2021
shares
Mar. 31, 2007
USD ($)
shares
Oct. 31, 2005
USD ($)
shares
Mar. 31, 2003
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
shares
Mar. 06, 2020
right
$ / shares
Mar. 31, 2010
shares
Class of Stock                    
Share price (in dollars per share) | $ / shares           $ 2.38        
Preferred stock, par value (in dollars per share) | $ / shares           0.01 $ 0.01      
Preferred stock liquidation preference (in dollars per share) | $ / shares           $ 25.00 $ 25.00      
Preferred dividends declared | $           $ 0        
Preferred dividends in arrears | $           $ 5,600,000        
Subsequent Event                    
Class of Stock                    
Issuance of common stock (in shares)   23,958,333                
Preferred dividends in arrears | $ $ 5,600,000                  
Common Stock                    
Class of Stock                    
Number of rights for each common stock outstanding | right                 1  
Series E Preferred Stock                    
Class of Stock                    
Preferred stock, par value (in dollars per share) | $ / shares                 $ 0.01  
Purchase price per unit (in dollars per share) | $ / shares                 $ 18.00  
9.750% Series B Preferred Stock                    
Class of Stock                    
Issuance of preferred stock (in shares)         2,500,000          
Issuance of preferred stock | $         $ 62,500,000          
Preferred stock, dividend rate (as percent)         9.75% 9.75% 9.75%      
Preferred stock liquidation preference (in dollars per share) | $ / shares         $ 25          
Cost incurred with stock issuance | $         $ 2,400,000          
Preferred stock, shares outstanding (in shares)           1,347,321 1,347,321     1,347,321
8.05% Series C Preferred stock                    
Class of Stock                    
Issuance of preferred stock (in shares)       1,600,000            
Issuance of preferred stock | $       $ 40,000,000.0            
Preferred stock, dividend rate (as percent)       8.05%   8.05% 8.05%      
Increased dividend rate of preferred stock, if delisting occurs (as percent)       9.05%            
Cost incurred with stock issuance | $       $ 1,500,000            
Preferred stock, shares outstanding (in shares)           496,000 496,000     496,000
8.375% Series D Preferred Stock                    
Class of Stock                    
Issuance of preferred stock (in shares)     2,000,000.0              
Issuance of preferred stock | $     $ 50,000,000.0              
Preferred stock, dividend rate (as percent)     8.375%     8.375% 8.375%      
Increased dividend rate of preferred stock, if delisting occurs (as percent)     9.375%              
Cost incurred with stock issuance | $     $ 1,800,000              
Preferred stock, shares outstanding (in shares)           620,000 620,000     620,000
Stock Option                    
Class of Stock                    
Dilutive common stock equivalents (in shares)           0 0 0    
Stock-based compensation expense | $           $ 800,000 $ 600,000 $ 2,200,000    
Unrecognized stock-based compensation expense, stock options | $           $ 1,100,000        
Weighted average period of recognition for stock-based compensation expense           1 year 8 months 12 days        
RSUs                    
Class of Stock                    
Dilutive common stock equivalents (in shares)           0 0 0    
Issuance of common stock (in shares)           160,792 8,548      
Stock-based compensation expense | $           $ 700,000 $ 700,000 $ 100,000    
Unrecognized stock-based compensation expense, stock options | $           $ 800,000        
Weighted average period of recognition for stock-based compensation expense           1 year 2 months 12 days        
Vesting period           1 year        
Granted (in shares)           110,206        
Shares vested and released           160,792        
RSUs | Non-employee                    
Class of Stock                    
Vesting period           1 year        
Granted (in shares)           110,206        
Shares issued upon vesting (in shares)           50,653        
RSUs | employee                    
Class of Stock                    
Granted (in shares)           0        
Director Stock Program                    
Class of Stock                    
Number of fully vested shares available for grant (as percent)               20.00%    
Omnibus Incentive Plan 2018 | Stock Compensation Plan                    
Class of Stock                    
Shares available for grants (in shares)           5,411,395        
Granted to the independent directors                    
Class of Stock                    
Issuance of common stock (in shares)             6,000 50,000    
Shares of common stock issued for compensation (in shares)           50,653 27,099      
Former Executive                    
Class of Stock                    
Issuance of common stock (in shares)           43,396        
Non-Employee Director | Director Stock Program                    
Class of Stock                    
Shares of common stock issued for compensation (in shares)             1,000 8,333    
Service period               30 days    
Number of shares (in shares)             5,000 41,667    
Common Stock Equivalents                    
Class of Stock                    
Dilutive common stock equivalents (in shares)           623,140 2,113,022 2,718,704