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Derivatives - Narrative (Details)
3 Months Ended
May 28, 2020
USD ($)
Mar. 31, 2021
USD ($)
shares
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Jan. 27, 2021
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Jul. 20, 2020
USD ($)
$ / shares
Apr. 06, 2020
USD ($)
$ / shares
shares
Oct. 31, 2019
USD ($)
Derivative [Line Items]                    
Remeasured derivative liability   $ 0       $ 7,507,000        
Reverse stock split, conversion ratio 0.10                  
Derivative liability $ 6,300,000   $ 5,600,000              
Mark-to-market loss recognized     3,500,000              
Pre-reverse stock split shares (in shares) | shares   538,995             538,995  
Exercise price (dollars per share) | $ / shares               $ 0.01 $ 0.01  
Estimated fair value of the Warrants $ 2,200,000             $ 300,000 $ 1,400,000  
(Level 3) | Derivative Liability                    
Derivative [Line Items]                    
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability value   $ 0       7,507,000        
Loss recorded on derivative liability   (3,186,000)                
Revolving Credit Facility | Line of Credit | (Level 3) | Derivative Liability                    
Derivative [Line Items]                    
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability value     $ 2,600,000 $ 5,300,000            
2023 Series D Convertible Notes | Convertible Notes Payable | (Level 3) | Derivative Liability                    
Derivative [Line Items]                    
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability value   0     $ 10,700,000 $ 7,507,000 $ 5,500,000      
Loss recorded on derivative liability   (3,186,000)                
2023 Series A Unsecured Convertible Notes for Series B Senior Unsecured Convertible Notes                    
Derivative [Line Items]                    
Derivative liability                   $ 13,500,000
Fair value of embedded derivative liability                   $ 2,000,000.0
Remeasured derivative liability       2,800,000            
Gain on change in fair value of derivative       $ 4,000,000.0            
2023 Series A Unsecured Convertible Notes for Series B Senior Unsecured Convertible Notes | Series B Senior Unsecured Convertible Notes | Convertible Notes Payable                    
Derivative [Line Items]                    
Fair value of embedded derivative liability   $ 2,000,000.0