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Debt - Maturities of Long-Term debt (Details)
$ in Thousands
Mar. 31, 2019
USD ($)
Debt Disclosure [Abstract]  
2019 (remaining nine months) $ 2,338
2020 3,122
2021 3,129
2022 39,425
2023 3,034
Thereafter 2,683
Total long-term debt, current and non-current $ 53,731