Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Additional Information (Details)

v3.21.1
Equity and Mezzanine Equity - Additional Information (Details)
 3 Months Ended
Aug. 04, 2020
$ / shares
shares
Jan. 01, 2019
Mar. 31, 2021
USD ($)
holder
quarter
$ / shares
shares
Mar. 31, 2020
USD ($)
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Jun. 15, 2016
shares
Jun. 04, 2015
shares
Equity [Line Items]              
Convertible preferred stock, terms of conversion     20        
Preferred stock, redemption price (in usd per share) | $ / shares     $ 25.00        
Arrears | $     $ 31,400,000        
SAR's, allowance for issuance (in shares) 5,000,000            
SAR's, price per share (in dollars per share) | $ / shares $ 1.85            
SAR's, threshold business days 20 days            
SAR's, threshold par value | $ / shares $ 20.00            
Series A Preferred              
Equity [Line Items]              
Preferred stock, shares outstanding (in shares)     562   562    
Preferred stock, shares authorized (in shares)     4,500   4,500    
Preferred stock, liquidation price per share (in dollars per share) | $ / shares     $ 1,000   $ 1,000    
Preferred stock, aggregate liquidation preference | $     $ 562,000   $ 562,000    
Preferred stock shares issued (in shares)     562   562    
Preferred stock, per share amounts of preferred dividends in arrears (in usd per share) | $ / shares     $ 225.00        
Arrears | $     $ 13,000 $ 13,000      
Series D Preferred Stock              
Equity [Line Items]              
Preferred stock, shares outstanding (in shares)     3,142,196        
Preferred stock, shares authorized (in shares)     4,000,000        
Preferred stock, liquidation price per share (in dollars per share) | $ / shares     $ 25.00        
Preferred stock, aggregate liquidation preference | $     $ 99,270,000   $ 109,130,000    
Preferred stock, dividend rate (as a percent)   10.75% 8.75%        
Preferred stock shares issued (in shares)     3,142,196   3,529,293    
Preferred stock, initial liquidation preference (in usd per share) | $ / shares     $ 2.1875        
Preferred stock, dividend over initial rate (as a percent)     2.00%        
Convertible preferred stock conversion price (in usd per share) | $ / shares     $ 16.96        
Number of business days to increase dividend rate after failure to pay any dividend     3        
Preferred stock, liquidation preference per share per annum (in usd per share) | $ / shares     $ 0.50        
Number of quarters Series D Preferred in arrears before Board of Directors increase | quarter     6        
Increase in number of directors after triggering event | holder     2        
Percentage of Series D Preferred required to request election of new directors     20.00%        
Series B Convertible Preferred Stock              
Equity [Line Items]              
Preferred stock, shares authorized (in shares)     5,000,000   5,000,000    
Preferred stock, liquidation price per share (in dollars per share) | $ / shares     $ 25.00   $ 25.00    
Preferred stock, aggregate liquidation preference | $     $ 46,900,000   $ 46,900,000    
Preferred stock, dividend rate (as a percent)     9.00%        
Preferred stock shares issued (in shares)     1,875,748   1,875,748    
Preferred stock adjusted conversion (in usd per share) | $ / shares     $ 58        
Preferred stock, redemption price (in usd per share) | $ / shares     $ 40.00        
Redeemable Preferred Stock              
Equity [Line Items]              
Preferred stock, shares outstanding (in shares)     562        
Common Stock [Member] | 2015 Long-Term Incentive Plan              
Equity [Line Items]              
Maximum number of shares authorized under Share Incentive Plan (in shares)             125,000
Shares available for issuance under Share Incentive Plan (in shares)     41,104        
Shares issued in period (in shares)     0 0      
Common Stock [Member] | 2016 Long-Term Incentive Plan              
Equity [Line Items]              
Maximum number of shares authorized under Share Incentive Plan (in shares)           625,000  
Shares available for issuance under Share Incentive Plan (in shares)     132,707        
Series B Preferred Stock              
Equity [Line Items]              
Preferred stock, shares outstanding (in shares)     1,875,748   1,875,748    
Preferred stock, shares authorized (in shares)     5,000,000   5,000,000    
Preferred stock, aggregate liquidation preference | $     $ 46,900,000   $ 46,900,000    
Preferred stock shares issued (in shares)     1,875,748   1,875,748    
Preferred stock, per share amounts of preferred dividends in arrears (in usd per share) | $ / shares     $ 5.62        
Arrears | $     $ 1,055,000 $ 1,055,000      
Series D Preferred              
Equity [Line Items]              
Preferred stock, shares outstanding (in shares)     3,142,196   3,529,293    
Preferred stock, per share amounts of preferred dividends in arrears (in usd per share) | $ / shares     $ 6.59        
Arrears | $     $ 2,111,000 $ 2,419,000      
Equity Distribution Agreement | Series A Preferred | Preferred Stock [Member]              
Equity [Line Items]              
Preferred stock, dividend rate (as a percent)     9.00%        
Conversion price percentage     103.00%        
Modified Dutch Auction | Series D Preferred Stock              
Equity [Line Items]              
Shares accepted for purchase (in shares)     387,097        
Purchase price (in dollars per share) | $ / shares     $ 15.50        
Aggregate cost | $     $ 6,000,000.00        
Maximum | Series D Preferred Stock              
Equity [Line Items]              
Preferred stock, dividend rate (as a percent)     14.00%