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Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 19, 2019
Debt      
Principal $ 50,831 $ 54,031  
Unaccreted Discount (2,819) (3,824)  
Debt Issuance Costs (29) (746)  
Carrying Value 47,983 49,461  
Interest rate (stated)     3.00%
Long-term Debt, Fiscal Year Maturity [Abstract]      
2021 4,799    
2022 12,234    
2023 20,346    
2024 13,302    
2025 150    
Total principal $ 50,831 54,031  
10% convertible promissory notes      
Debt      
Principal   7,324  
Unaccreted Discount   (36)  
Carrying Value   7,288  
Interest rate (stated) 10.00%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal   7,324  
6% promissory note, due 2020      
Debt      
Principal   185  
Carrying Value   185  
Interest rate (stated) 6.00%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal   185  
2.55% promissory notes, due 2020      
Debt      
Principal   1,100  
Unaccreted Discount   (41)  
Carrying Value   1,059  
Interest rate (stated) 2.55%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal   1,100  
3.5% convertible promissory note, due 2022      
Debt      
Principal   1,689  
Unaccreted Discount   (313)  
Carrying Value   1,376  
Interest rate (stated) 3.50%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal   1,689  
9.0% term loan, due 2023      
Debt      
Principal   40,500  
Unaccreted Discount   (528)  
Debt Issuance Costs   (689)  
Carrying Value   39,283  
Interest rate (stated) 9.00%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal   40,500  
3% promissory note, due 2024      
Debt      
Principal   3,000  
Unaccreted Discount   (2,906)  
Debt Issuance Costs   (57)  
Carrying Value   37  
Interest rate (stated) 3.00%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal   3,000  
1.0% promissory notes, due 2022      
Debt      
Principal $ 8,317    
Carrying Value $ 8,317    
Interest rate (stated) 1.00%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal $ 8,317    
11.05% term loan, due 2024      
Debt      
Principal 41,764    
Unaccreted Discount (2,686)    
Debt Issuance Costs (29)    
Carrying Value $ 39,049    
Interest rate (stated) 11.05%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal $ 41,764    
Other notes      
Debt      
Principal 750 233  
Unaccreted Discount (133)    
Carrying Value 617 233  
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal 750 $ 233  
10% convertible notes      
Debt      
Principal 5,500    
Fair Value $ 11,659    
Interest rate (stated) 10.00%    
Long-term Debt, Fiscal Year Maturity [Abstract]      
Total principal $ 5,500