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TAXES ON INCOME (Schedule of Deferred Tax Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
In respect of: |  |
Research and development expenses | $ 7,217 | $ 9,598
Other timing differences | (1,989) | 40
Net operating loss carry forwards | 56,292 | 54,122
Valuation allowance | (61,520) | (63,760)
Total net deferred tax assets | $ 0 | $ 0

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