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SIGNIFICANT ACCOUNTING POLICIES (Concentrations of Credit Risks) (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
customer
Dec. 31, 2016
USD ($)
customer
Concentration Risk [Line Items]    
Allowance for doubtful accounts $ 324 $ 333
Sales return reserve $ 105 $ 105
Trade Receivable | Customer concentration    
Concentration Risk [Line Items]    
Number of customers | customer 1 1
Concentration risk (as a percent) 8.00% 0.00%