Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Additional Information (Details)

v3.19.3
Equity and Mezzanine Equity - Additional Information (Details)
 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 01, 2019
Sep. 30, 2019
USD ($)
director
quarter
$ / shares
shares
Sep. 30, 2018
shares
Sep. 30, 2019
USD ($)
director
quarter
$ / shares
shares
Sep. 30, 2018
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Apr. 29, 2019
shares
Jun. 15, 2016
shares
Jun. 04, 2015
shares
Apr. 29, 2014
$ / shares
shares
Equity [Line Items]                    
Convertible Preferred Stock, Terms of Conversion       P20D            
Preferred Stock, Redemption Price Per Share | $ / shares   $ 25.00   $ 25.00            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)             248,325      
Series A Preferred                    
Equity [Line Items]                    
Preferred stock, shares outstanding (in shares)   562   562   562        
Preferred stock, shares authorized (in shares)   4,500   4,500   4,500        
Preferred stock, liquidation price per share (in dollars per share) | $ / shares   $ 1,000   $ 1,000   $ 1,000        
Preferred Stock, Liquidation Preference, Value | $   $ 562,000   $ 562,000   $ 562,000        
Preferred stock shares issued (in shares)   562   562   562        
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, Liquidation Preference, Value | $   $ 46,900,000.00   $ 46,900,000.00            
Preferred Stock, Dividend Rate, Percentage       9.00%            
Preferred stock shares issued (in shares)   1,875,748   1,875,748            
Preferred Stock Adjusted Conversion Price Per Share | $ / shares   $ 58   $ 58            
Preferred Stock, Redemption Price Per Share | $ / shares   $ 40.00   $ 40.00            
Redeemable Preferred Stock                    
Equity [Line Items]                    
Preferred stock, shares outstanding (in shares)   562   562            
Series D Preferred Stock                    
Equity [Line Items]                    
Preferred stock, shares outstanding (in shares)   3,600,636   3,600,636            
Preferred stock, shares authorized (in shares)   4,000,000   4,000,000            
Preferred stock, liquidation price per share (in dollars per share) | $ / shares   $ 25.00   $ 25.00            
Preferred Stock, Liquidation Preference, Value | $   $ 99,240,000.00   $ 99,240,000.00   $ 91,980,000.00        
Preferred Stock, Dividend Rate, Percentage 10.75%         8.75%        
Preferred stock shares issued (in shares)   3,600,636   3,600,636            
Preferred Stock, Initial Liquidation Preference Per Share | $ / shares   $ 2.1875   $ 2.1875            
Preferred Stock, Dividend Over Initial Rate, Percentage       2.00%            
Convertible Preferred Stock Conversion Price | $ / 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 | $ / shares   $ 0.50   $ 0.50            
Preferred Stock, Minimum Consecutive Quarterly Periods for Dividends in Arrears | quarter   6   6            
Number of Additional Directors | director   2   2            
Preferred Stock, Percentage of Holders of Shares Outstanding   20.00%   20.00%            
Common Stock                    
Equity [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                   1,986,600
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)                   0.125
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                   $ 44
Common Stock | 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   41,104            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   0 0 0 0          
Common Stock | 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   132,707            
Equity Distribution Agreement | Series A Preferred | Preferred Stock                    
Equity [Line Items]                    
Preferred Stock, Dividend Rate, Percentage       9.00%            
Conversion Price Percentage       103.00%            
Maximum | Series D Preferred Stock                    
Equity [Line Items]                    
Preferred Stock, Dividend Rate, Percentage       14.00%