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Other Accounts Receivable and Prepaid Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Receivables [Abstract]    
Government authorities $ 96 $ 71
Advances to suppliers 268 193
Prepaid expenses 377 578
Accrued income 56 29
Other 32 27
Other accounts receivables and prepaid expenses $ 829 $ 898