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RELATED PARTY BALANCES AND TRANSACTIONS (Schedule Of Transaction With Related Parties) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]      
Revenues $ 5,843 $ 6,745 $ 3,336
Cost of revenues 4,715 1,659 1,111
Research And Development Expense [Member]      
Related Party Transaction [Line Items]      
Expenses 1,245 1,248 1,008
Selling And Marketing Expense [Member]      
Related Party Transaction [Line Items]      
Expenses 731 763 771
General And Administrative Expense [Member]      
Related Party Transaction [Line Items]      
Expenses 913 1,002 1,067
Purchase Of Property And Equpment [Member]      
Related Party Transaction [Line Items]      
Expenses $ 274 $ 46 $ 148