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Related Parties Balances and Transactions (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Amounts charged to:    
General and administrative expenses [1] $ 1,212 $ 1,140
Finance expenses, net (income) $ (625)
[1] Including an amount of $76 with respect to stock-based compensation