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Events after the reporting date (Details)
$ / shares in Units, $ in Thousands
 2 Months Ended 12 Months Ended 15 Months Ended
Mar. 06, 2020
$ / shares
Dec. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
$ / shares
shares
Disclosure of non-adjusting events after reporting period [line items]      
Issuance of share capital due conversion of loan | $   $ 5,140  
Convertible Note      
Disclosure of non-adjusting events after reporting period [line items]      
Issuance of share capital due conversion of loan | $     $ 1,168
Conversion price | $ / shares     $ 1
Number of shares issued | shares     1,167,767
Written notification from the Nasdaq Stock Market      
Disclosure of non-adjusting events after reporting period [line items]      
Minimum bid price continued listing requirement days 30    
Minimum bid price continued listing requirement | $ / shares $ 1    
Applicable grace period 180