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Other Accounts Receivable and Prepaid Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Accounts Receivable and Prepaid Expenses [Abstract]    
Government authorities $ 71 $ 145
Advances to suppliers 193 328
Prepaid expenses 578 436
Accrued income 29 26
Other 27 57
Other accounts receivables and prepaid expenses $ 898 $ 992