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Commitments and Contingent Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]    
2019 $ 345  
2020 638  
2021 613  
2022 566  
2023 439  
Total lease payments 2,601  
Less: imputed interest (562)  
Present value of future lease payments 2,039  
Less: current maturities of operating leases 635
Non-current operating leases $ 1,404
Weighted-average remaining lease term (in years) 3 years 5 months 23 days  
Weighted-average discount rate 12.50%