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
Mar. 31, 2020
Mar. 31, 2019
Interest expense    
Interest expense $ 542 $ 429
Silicon Valley Bank Loan Agreement    
Interest expense    
Interest expense 383 242
Novartis Note    
Interest expense    
Interest expense 158 186
Other    
Interest expense    
Interest expense $ 1 $ 1