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Debt - Maturities of Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Debt    
2019 $ 553  
2020 1,986  
2021 2,194  
2022 2,208  
2023 2,232  
Thereafter 72,645  
Long term debt $ 81,818 $ 70,976