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Supplementary Information to Statements of Operations (Details 1) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Numerator:      
Income $ 773 $ 360 $ 334
Net income available to Ordinary shareholders $ 773 $ 360 $ 334
Denominator (in thousands):      
Basic weighted average Ordinary shares outstanding (in thousands) 3,171 2,587 1,970
Diluted weighted average Ordinary shares outstanding (in thousands) 3,171 2,593 1,970
Basic and diluted income per share $ 0.24 $ 0.14 $ 0.17