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Financial Instruments (Details 3) - Level 1 [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]    
Beginning Balance
Fair value of warrants at issuance date 4,603  
Changes in values of warrants exercisable into shares liability 3,037
Ending Balance $ 1,566