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TAXES ON INCOME (Tables) | 12 Months Ended
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Dec. 31, 2019
TAXES ON INCOME |
Schedule of Deferred Tax Assets | The components of the Company’s net deferred tax assets at December 31, 2018 and 2019 were as follows:
|  | December 31,
(U.S. dollars in thousands) |  | 2018 |  | 2019
In respect of: |  |  |  |  |  |
Research and development expenses |  | $ | 6,188 |  | $ | 9,247
Other timing differences |  |  | (11) |  |  | 25
Net operating loss carry forwards |  |  | 49,436 |  |  | 50,236
Valuation allowance |  |  | (55,613) |  |  | (59,508)
|  |  | — |  |  | —
Schedule of Open Tax Years | A summary of open tax years by major jurisdiction is presented below:
Jurisdiction: |  | Years:
Israel |  | 2015-2019
United States (*) |  | 2015-2019
(*)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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