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SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Other Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other assets:    
Institutions $ 394 $ 333
State of Israel (see note 6a) 195 1,046
Restricted deposit 623 477
Prepaid expenses 433 416
Assets of discontinued operation 215 327
Sundry 74 49
Other assets $ 1,934 $ 2,648