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TAXES ON INCOME (Tables) | 12 Months Ended
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Dec. 31, 2020
TAXES ON INCOME |
Schedule of Deferred Tax Assets | The components of the Company’s net deferred tax assets at December 31, 2019 and 2020 were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(U.S. dollars in thousands) |  | 2019 |  | 2020
In respect of: |  | ​ |  |  | ​ |
Research and development expenses | ​ | $ | 9,247 | ​ | $ | 9,598
Other timing differences | ​ |  | 25 | ​ |  | 40
Net operating loss carry forwards | ​ |  | 50,236 | ​ |  | 54,122
Valuation allowance | ​ |  | (59,508) | ​ |  | (63,760)
​ | ​ |  | - | ​ |  | -
Schedule of Open Tax Years |
​ | ​ | ​
Jurisdiction: |  | Years:
Israel |  | 2016-2020
United States (*) |  | 2017-2020
​
(*) | Includes federal, state and local (or similar provincial jurisdictions) tax positions.

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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