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Debt, Net - Maturities of Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Debt, Net    
2018 $ 494  
2019 1,567  
2020 1,772  
2021 1,955  
2022 1,935  
Thereafter 53,096  
Long term debt $ 60,819 $ 56,160