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Debt - Long-Term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Long-term debt    
Total long-term debt $ 7,477 $ 34,502
Maturities of long-term debt    
2021 1,156  
2022 2,493  
2023 1,351  
Term loan    
Long-term debt    
Term loan payable 5,000 35,000
End of term fee 1,905 443
Unamortized debt issuance costs (244) (1,742)
Total long-term debt 6,661 33,701
Other long-term debt    
Long-term debt    
Total long-term debt $ 816 $ 801