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Related Parties - Transactions and Balances (Details) - Schedule of related parties transactions - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Research and development – see c and d below [Member]      
Related Parties - Transactions and Balances (Details) - Schedule of related parties transactions [Line Items]      
Related parties transactions $ 355 $ 154 $ 542
General and administrative – See c, e and f below [Member]      
Related Parties - Transactions and Balances (Details) - Schedule of related parties transactions [Line Items]      
Related parties transactions $ (167) $ 5,824 $ 892