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Taxes on Income (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Operating loss carry forwards $ 2,899 $ 2,974
Reserves and allowances 5 6
Research and development 261 128
Net deferred tax asset before valuation allowance 3,165 3,108
Valuation allowance (3,165) (3,108)
Net deferred tax asset