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Equity and Equity-Based Compensation - Summary of Issuance Activity (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 10 Months Ended
May 17, 2021
Mar. 12, 2021
Dec. 07, 2020
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2021
Lincoln Park Capital Fund, LLC | Private Placement            
Class of Stock [Line Items]            
Shares issued (in shares)   16,000 19,000     1,000,000
Gross proceeds received           $ 25,100
Lincoln Park Capital Fund, LLC | Common Stock | Private Placement            
Class of Stock [Line Items]            
Shares issued (in shares)       0 205,000  
Gross proceeds received       $ 0 $ 4,590  
Lincoln Park Capital Fund, LLC | Common Stock | Shares sold to Lincoln Park            
Class of Stock [Line Items]            
Shares issued (in shares)       0 2,050,000  
Lincoln Park Capital Fund, LLC | Common Stock | Additional commitment shares            
Class of Stock [Line Items]            
Shares issued (in shares)       0 16,000  
Lincoln Park Capital Fund, LLC | Common Stock | Private Placement, Second Purchase Agreement            
Class of Stock [Line Items]            
Shares issued (in shares)       0 2,066,000  
Gross proceeds received       $ 0 $ 43,586  
Keystone Capital Partners, LLC | Private Placement            
Class of Stock [Line Items]            
Shares issued (in shares) 4,000          
Keystone Capital Partners, LLC | Common Stock | Shares sold to Lincoln Park            
Class of Stock [Line Items]            
Shares issued (in shares)       0 3,062,000  
Keystone Capital Partners, LLC | Common Stock | Additional commitment shares            
Class of Stock [Line Items]            
Shares issued (in shares)       0 4,000  
Keystone Capital Partners, LLC | Common Stock | Private Placement, Second Purchase Agreement            
Class of Stock [Line Items]            
Shares issued (in shares)       0 3,066,000  
Gross proceeds received       $ 0 $ 147,961  
YA II PN, Ltd. | Common Stock | Private Placement            
Class of Stock [Line Items]            
Shares issued (in shares)       0 1,372,000  
Gross proceeds received       $ 0 $ 40,556  
YA II PN, Ltd. | Common Stock | Private Placement, Second SEDA            
Class of Stock [Line Items]            
Shares issued (in shares)       787,000 3,790,000  
Gross proceeds received       $ 3,034 $ 165,391  
Seven Knots, LLC | Common Stock | Private Placement            
Class of Stock [Line Items]            
Shares issued (in shares)       4,009,000 4,009,000  
Gross proceeds received       $ 81,279 $ 81,279  
B. Riley Principal Capital, LLC | Common Stock | Private Placement            
Class of Stock [Line Items]            
Shares issued (in shares)       4,500,000 4,500,000  
Gross proceeds received       $ 66,199 $ 66,199