Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Interest Expense and Amortization of Debt Issuance Costs (Details)

v3.19.1
Long-Term Debt - Interest Expense and Amortization of Debt Issuance Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Interest expense and amortization of debt issuance costs [Abstract]    
Interest expense $ 429 $ 170
Novartis Note [Member]    
Interest expense and amortization of debt issuance costs [Abstract]    
Interest expense 186 139
SVB Loan [Member]    
Interest expense and amortization of debt issuance costs [Abstract]    
Interest expense 242  
Other [Member]    
Interest expense and amortization of debt issuance costs [Abstract]    
Interest expense $ 1 $ 31