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FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Financial instruments      
Percentage of currency stronger against the NIS 5.00% 5.00% 5.00%
Additional expense that would have been recognized $ 3,000 $ 12,000 $ 58,000
Fair value of borrowing 94,000,000    
Payable in respect of intangible assets purchase balances $ 26,600,000    
Maximum      
Financial instruments      
Maturity periods for cash balances in highly-rated bank deposits 1 year    
Portfolio invested in a single bond issuer (as a percent) 10.00%    
Interest rate risk [member] | Floating rate | Minimum      
Financial instruments      
Spread rate 1.75%    
Interest rate risk [member] | Fixed rate      
Financial instruments      
Borrowings, interest rate 8.20%    
Interest rate risk [member] | Fixed rate | Period for trailing four quarters ending March 31, 2021      
Financial instruments      
Borrowings, interest rate 6.70%