Share Capital (Details 2) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2020  | 
Jun. 30, 2019  | 
Jun. 30, 2020  | 
Jun. 30, 2019  | 
|
| Share-based compensation | $ 477 | $ 289 | $ 794 | $ 629 | 
| Research and development expenses, net [Member] | ||||
| Share-based compensation | 152 | 108 | 237 | 215 | 
| General and administrative expenses [Member] | ||||
| Share-based compensation | $ 325 | $ 181 | $ 557 | $ 414 | 
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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