Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt and Other Financings - Interest Expense (Details)

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Long-Term Debt and Other Financings - Interest Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Interest expense        
Interest expense $ 508 $ 423 $ 1,050 $ 852
Silicon Valley Bank Loans        
Interest expense        
Interest expense 356 236 739 477
Novartis Note        
Interest expense        
Interest expense 151 186 309 372
Other        
Interest expense        
Interest expense $ 1 $ 1 $ 2 $ 3