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General (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 27, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
General (Textual)            
Net loss   $ (1,214) $ (1,863) $ (3,262) $ (2,499) $ (6,244)
Operating Activities       3,500    
Accumulated deficit   $ (41,651) $ (34,644) $ (41,651) $ (34,644) $ (38,389)
Initial public offering $ 13,700          
Ordinary shares       40    
Ownership interest, percentage       27.00%