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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Trade receivables net of allowance for doubtful accounts $ 2,992 $ 3,852
Ordinary stock, par value (in NIS) $ 0.1 $ 0.1
Ordinary stock, shares authorized 50,000,000 50,000,000
Ordinary stock, shares issued 48,861,038 44,488,578
Ordinary stock, shares outstanding 48,861,038 44,488,578