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Financial Income (Expenses), Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other Income and Expenses [Abstract]      
Interest income $ 751 $ 1,026 $ 1,266
Discount on marketable securities, net (358) (561) (758)
Exchange rate differences, net (236) (148) (95)
Bank charges (122) (97) (150)
Financial income, net $ 35 $ 220 $ 263