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Leases - Schedule of Maturities of Financing Leases (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Leases [Abstract]    
2019 $ 6  
2020 23  
2021 21  
Total financing lease payments 50  
Less imputed interest (3)  
Present value of financing lease liabilities $ 47 $ 86