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Interim Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Net loss $ (1,961) $ (1,482)
Other comprehensive loss (income):    
Unrealized loss on marketable debt security [1]
Comprehensive loss $ (1,961) $ (1,482)
[1] Less than 1