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SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Property Plant And Equipment Estimated Useful Lives) (Details)
12 Months Ended
Dec. 31, 2019
Computers, peripheral equipment and electronic equipment  
Property, Plant and Equipment [Line Items]  
Annual depreciation rate 33.00%
Computers, peripheral equipment and electronic equipment | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Annual depreciation rate 15.00%
Computers, peripheral equipment and electronic equipment | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Annual depreciation rate 33.00%
Office furniture and equipment  
Property, Plant and Equipment [Line Items]  
Annual depreciation rate 6.00%
Office furniture and equipment | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Annual depreciation rate 6.00%
Office furniture and equipment | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Annual depreciation rate 14.00%
Leasehold improvements [Member]  
Property, Plant and Equipment [Line Items]  
Depreciation rate, description Over the shorter of the related lease period or the