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Leases - Maturities of Lease Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Leases [Abstract]    
Remainder of 2019 $ 195  
2020 174  
2021 116  
2022 44  
2023 0  
Thereafter 0  
Total lease payments 529  
Less imputed interest (42)  
Total $ 487 $ 600