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Notes Payable, Long-Term Debt and Other Obligations (Other Schedules) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 15, 2019
Fair Value Of Derivatives [Roll Forward]        
Interest expense associated with beneficial conversion feature $ 0 $ 1,223 $ 6,301  
Unamortized Debt Discount Reconciliation [Roll Forward]        
Amortization of beneficial conversion feature 0 (1,223) (6,301)  
Variable Interest Senior Convertible Debt        
Debt Instrument [Line Items]        
Interest expense associated with embedded derivatives 0 4,053 18,512  
Gain on changes in fair value of derivatives embedded within convertible debt 0 4,999 26,425  
Fair Value Of Derivatives [Roll Forward]        
Gain from changes in fair value of embedded derivatives 0 (4,999) (26,425)  
Interest expense associated with beneficial conversion feature   1,223 6,301  
Unamortized Debt Discount Reconciliation [Roll Forward]        
Beginning balance of unamortized discount 0 5,276 32,824  
Amortization of embedded derivatives   (4,053) (18,512)  
Amortization of beneficial conversion feature   (1,223) (6,301)  
Ending balance of unamortized discount   0 5,276  
Variable Interest Senior Convertible Debt | Embedded Derivatives        
Debt Instrument [Line Items]        
Gain on changes in fair value of derivatives embedded within convertible debt   4,999 26,425  
Fair Value Of Derivatives [Roll Forward]        
Beginning balance of derivative liability fair value $ 0 4,999 31,424  
Gain from changes in fair value of embedded derivatives   (4,999) (26,425)  
Beginning balance of derivative liability fair value   0 4,999  
Variable Interest Senior Convertible Debt | 7.5% Convertible Notes        
Debt Instrument [Line Items]        
Interest rate 7.50%     7.50%
Interest expense associated with embedded derivatives $ 0 0 2,031  
Gain on changes in fair value of derivatives embedded within convertible debt 0 0 6,635  
Fair Value Of Derivatives [Roll Forward]        
Gain from changes in fair value of embedded derivatives 0 0 (6,635)  
Interest expense associated with beneficial conversion feature 0 0 1,328  
Unamortized Debt Discount Reconciliation [Roll Forward]        
Beginning balance of unamortized discount 0 0 3,359  
Amortization of embedded derivatives   0 (2,031)  
Amortization of beneficial conversion feature 0 0 (1,328)  
Ending balance of unamortized discount   0 0  
Variable Interest Senior Convertible Debt | 7.5% Convertible Notes | Embedded Derivatives        
Debt Instrument [Line Items]        
Gain on changes in fair value of derivatives embedded within convertible debt   0 6,635  
Fair Value Of Derivatives [Roll Forward]        
Beginning balance of derivative liability fair value $ 0 0 6,635  
Gain from changes in fair value of embedded derivatives   0 (6,635)  
Beginning balance of derivative liability fair value   0 0  
Variable Interest Senior Convertible Debt | 5.5% Convertible Notes        
Debt Instrument [Line Items]        
Interest rate 5.50%      
Interest expense associated with embedded derivatives $ 0 4,053 16,481  
Gain on changes in fair value of derivatives embedded within convertible debt 0 4,999 19,790  
Fair Value Of Derivatives [Roll Forward]        
Gain from changes in fair value of embedded derivatives 0 (4,999) (19,790)  
Interest expense associated with beneficial conversion feature 0 1,223 4,973  
Unamortized Debt Discount Reconciliation [Roll Forward]        
Beginning balance of unamortized discount 0 5,276 29,465  
Amortization of embedded derivatives   (4,053) (16,481)  
Amortization of beneficial conversion feature 0 (1,223) (4,973)  
Ending balance of unamortized discount   0 5,276  
Variable Interest Senior Convertible Debt | 5.5% Convertible Notes | Interest Rate Risk        
Unamortized Debt Discount Reconciliation [Roll Forward]        
Partial redemption of 5.5% convertible notes     (2,735)  
Variable Interest Senior Convertible Debt | 5.5% Convertible Notes | Embedded Derivatives        
Debt Instrument [Line Items]        
Gain on changes in fair value of derivatives embedded within convertible debt   4,999 19,790  
Fair Value Of Derivatives [Roll Forward]        
Beginning balance of derivative liability fair value $ 0 4,999 24,789  
Gain from changes in fair value of embedded derivatives   (4,999) (19,790)  
Beginning balance of derivative liability fair value   $ 0 $ 4,999