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Leases- Minimum annual rental commitments (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
Leases    
2019 $ 824  
2020 1,450  
2021 1,313  
2022 1,124  
2023 777  
Thereafter 1,840  
Total lease payments 7,328  
Less: Interest 1,195  
Present value of lease liabilities $ 6,133 $ 6,700