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Financial Instruments and Financial Risk Management (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]      
Classification to equity of Series B warrants   $ 2,286  
Exercise of anti-dilution feature $ 2,302    
Level 3 Instruments [Member]      
Statement Line Items [Line Items]      
Balance 753 94 [1]
Initial recognition 753 2,273 299
Finance expenses (income) 3,175 (1,614) 1,044
Classification to equity of Series B warrants 2,239   (1,249)
Classification to level 1 (see Note 13(e)) (3,479)   94
Exercise of anti-dilution feature (901)   (12)
Settlement/cancellation (1,787)    
Balance 753 94
Total unrealized losses for the period included in profit or loss for liabilities held 2,239 (1,614) (12)
Level 3 Instruments [Member] | Bridge Loan [Member]      
Statement Line Items [Line Items]      
Balance   [1]
Initial recognition    
Finance expenses (income) [2]     800
Classification to equity of Series B warrants     (800)
Classification to level 1 (see Note 13(e))    
Exercise of anti-dilution feature    
Balance    
Total unrealized losses for the period included in profit or loss for liabilities held    
Level 3 Instruments [Member] | Financing of Issuance Expenses [Member]      
Statement Line Items [Line Items]      
Balance   [1]
Initial recognition    
Finance expenses (income) [2]     256
Classification to equity of Series B warrants     (256)
Classification to level 1 (see Note 13(e))    
Exercise of anti-dilution feature    
Balance    
Total unrealized losses for the period included in profit or loss for liabilities held    
Level 3 Instruments [Member] | Derivative Financial Instruments [Member]      
Statement Line Items [Line Items]      
Balance 61  
Initial recognition 61 1,958  
Finance expenses (income) 2,678 (1,897)  
Classification to equity of Series B warrants 1,641    
Classification to level 1 (see Note 13(e)) (3,479)    
Exercise of anti-dilution feature (901)    
Settlement/cancellation    
Balance 61
Total unrealized losses for the period included in profit or loss for liabilities held 1,641 (1,897)  
Level 3 Instruments [Member] | Options to Group Of Investors [Member]      
Statement Line Items [Line Items]      
Balance  
Initial recognition     193
Finance expenses (income)    
Classification to equity of Series B warrants     (193)
Classification to level 1 (see Note 13(e))    
Exercise of anti-dilution feature    
Balance    
Total unrealized losses for the period included in profit or loss for liabilities held    
Anti-Dilution Feature [Member] | Level 3 Instruments [Member]      
Statement Line Items [Line Items]      
Balance 692 94
Initial recognition 692 315 106
Finance expenses (income) 497 283 (12)
Classification to equity of Series B warrants 598  
Classification to level 1 (see Note 13(e))   94
Exercise of anti-dilution feature   (12)
Settlement/cancellation (1,787)    
Balance 692 94
Total unrealized losses for the period included in profit or loss for liabilities held $ 598 $ 283 $ (12)
[1] Represents an amount of less than $ 1 thousands.
[2] Recognition of deferred initial loss at an amount equal to the cash amount paid by the Company at the time of completion the Merger Transaction.