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Significant Accounting Policies (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Operating lease costs :  
Total operating lease cost $ 261
Future lease payments are:  
The remainder of 2019 265
2020 472
2021 222
2022 19
2023 9
Total future lease payments 987
Vehicles [Member]  
Operating lease costs :  
Total operating lease cost $ 142
Weighted Average Discount Rate  
Weighted Average Discount Rate 3.36%
Vehicles [Member] | Minimum [Member]  
Remaining Lease Term  
Remaining Lease Term 9 months 18 days
Vehicles [Member] | Maximum [Member]  
Remaining Lease Term  
Remaining Lease Term 2 years 1 month 9 days
Facilities rent [Member]  
Operating lease costs :  
Total operating lease cost $ 119
Weighted Average Discount Rate  
Weighted Average Discount Rate 3.36%
Facilities rent [Member] | Minimum [Member]  
Remaining Lease Term  
Remaining Lease Term 1 year 9 months 18 days
Facilities rent [Member] | Maximum [Member]  
Remaining Lease Term  
Remaining Lease Term 3 years 9 months 18 days