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Convertible Loans (Details 1) - 2017 Loan [Member] - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Roll forward of 2017 Loan and 2016 Loan    
Opening balance (including interest) $ 2,635 $ 3,204
Amortization of premium related to convertible loans prior to 2018 modification (1,458)
Amortization of premium related to convertible loans following 2018 modification (641) (691)
Derecognition of carrying amount of 2016 Loan and 2017 Loan upon extinguishments – March 2019 modification (1,873) (1,680)
Accrued interest on 2017 Loan and 2016 Loan 36 56
Amount allocated to 2016 Loan and 2017 Loan based on modified terms – March 2019 modification 1,767 3,204
Amortization of premium related to convertible loans following March 2019 modifications (413)
Derecognition of carrying amount of 2016 Loan and 2017 Loan upon extinguishments – May 2019 extension (1,353)
Amount allocated to 2016 Loan and 2017 Loan based on modified terms – May 2019 extension 1,556
Amortization of premium related to convertible loans - May 2019 extension (134)
Closing balance $ 1,580 $ 2,635