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Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 11, 2019
May 30, 2017
May 29, 2017
Aug. 02, 2016
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 20, 2018
Dec. 18, 2018
Class of Warrant or Right [Line Items]                  
Preferred stock cumulative cash dividend rate         7.50%        
Preferred stock dividend rate         4.00%        
Accreting dividend threshold rate         7.25%        
Volume weighted average price threshold percentage   150.00% 150.00%   150.00%        
Common stock trading period to calculate volume weighted average price   30 days              
Preferred stock trading days to calculate volume weighted average price (at least)   20 days              
Preferred stock force conversion, trading days to calculate volume weighted average price   30 days              
Consent rights percentage (at least)         75.00%        
Additional share consideration valued at         $ 0.2 $ 0.2      
Maximum                  
Class of Warrant or Right [Line Items]                  
Preferred stock dividend rate         2.00%        
Minimum                  
Class of Warrant or Right [Line Items]                  
Preferred stock dividend rate         0.00%        
Corrib Master Fund, Ltd. and Luxor Capital Partners, LP                  
Class of Warrant or Right [Line Items]                  
Preferred stock trading days to calculate volume weighted average price (at least)         30 days        
Volume weighted average price threshold period         2 days        
Percent of accrued value         1.875%        
Series A- One Preferred Stock                  
Class of Warrant or Right [Line Items]                  
Preferred stock conversion price (in usd per share)         $ 3.52        
Series A-2 Preferred Stock                  
Class of Warrant or Right [Line Items]                  
Preferred stock conversion price (in usd per share)         $ 5.34        
Number of shares to be issued upon conversion of preferred stock (in shares)         751,880        
Series A-2 Preferred Stock | CGI                  
Class of Warrant or Right [Line Items]                  
Issuance and sale of common stock (in shares) 10,000                
Series A shares issued and outstanding                  
Class of Warrant or Right [Line Items]                  
Number of shares to be issued upon conversion of preferred stock (in shares)         1,835,695        
Shares issued (in shares)         6,375   6,375    
Series A shares issued and outstanding | CGI                  
Class of Warrant or Right [Line Items]                  
Shares issued (in shares)               6,125 6,125
Series A shares issued and outstanding | Corrib Master Fund, Ltd.                  
Class of Warrant or Right [Line Items]                  
Conversion of stock, number of shares (in shares)         5,521 8,752      
Issuance and sale of common stock (in shares)       1,000          
Series A shares issued and outstanding | Luxor Capital Partners, LP                  
Class of Warrant or Right [Line Items]                  
Conversion of stock, number of shares (in shares)         49,075 77,794      
Common Stock | CGI                  
Class of Warrant or Right [Line Items]                  
Conversion of stock, number of shares (in shares)         1,879,699        
Common Stock | DG Value Partners, LP and DG Value Partners II Master Funds LP                  
Class of Warrant or Right [Line Items]                  
Conversion of stock, number of shares (in shares)         1,763,706        
Series A-1 shares issued and outstanding | Luxor Capital Partners, LP                  
Class of Warrant or Right [Line Items]                  
Issuance and sale of common stock (in shares)       9,000