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Consolidated Balance Sheets (Parenthetical)
$ in Thousands
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2019
₪ / shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2018
₪ / shares
Statement of Financial Position [Abstract]        
Net of allowances for doubtful accounts | $ $ 19   $ 19  
Ordinary shares, par value | ₪ / shares   ₪ 0.20   ₪ 0.20
Ordinary shares, shares authorized 20,000,000   20,000,000  
Ordinary shares, shares issued 13,773,503   13,735,759  
Ordinary shares, shares outstanding 13,737,471   13,699,727