v3.8.0.1
Loss per share (Schedule of Basic and Diluted Loss Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of the basic and diluted earnings per share computation:      
Net loss for earnings per share $ (11,214) $ (5,047) $ (2,418)
Weighted average shares used in diluted computation - basic and diluted 11,341,629 7,422,208 4,400,298
Loss per share - basic and diluted $ (0.99) $ (0.68) $ (0.55)