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Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Total Financial Assets at Fair Value   $ 1,965  
Derivative liability - convertible notes   1,203  
Profits interest sold   1,971  
Embedded put option   376  
Warrant Liability $ 22,686 24 $ 4,528
Warrant liability - subsidiary   24  
Total Financial Liabilities at Fair Value 22,686 3,574  
Financial Assets Fair Value [Member]      
Total Financial Assets at Fair Value   1,965  
Level 1 [Member]      
Total Financial Assets at Fair Value    
Derivative liability - convertible notes    
Profits interest sold    
Embedded put option    
Warrant Liability    
Warrant liability - subsidiary    
Total Financial Liabilities at Fair Value  
Level 1 [Member] | Financial Assets Fair Value [Member]      
Total Financial Assets at Fair Value    
Level 2 [Member]      
Total Financial Assets at Fair Value    
Derivative liability - convertible notes    
Profits interest sold    
Embedded put option    
Warrant Liability    
Warrant liability - subsidiary    
Total Financial Liabilities at Fair Value  
Level 2 [Member] | Financial Assets Fair Value [Member]      
Total Financial Assets at Fair Value    
Level 3 [Member]      
Total Financial Assets at Fair Value   1,965  
Derivative liability - convertible notes   1,203  
Profits interest sold   1,971  
Embedded put option   376  
Warrant Liability 22,686    
Warrant liability - subsidiary   24  
Total Financial Liabilities at Fair Value $ 22,686 3,574  
Level 3 [Member] | Financial Assets Fair Value [Member]      
Total Financial Assets at Fair Value   $ 1,965