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Commitments and Contingent Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]    
2019 $ 524  
2020 638  
2021 613  
2022 566  
2023 439  
Total lease payments 2,780  
Less: imputed interest (637)  
Present value of future lease payments 2,143  
Less: current maturities of operating leases 647
Non-current operating leases $ 1,496
Weighted-average remaining lease term (in years) 3 years 10 months 3 days  
Weighted-average discount rate 12.51%