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Other Accounts Receivable and Prepaid Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Receivables [Abstract]    
Prepaid expenses $ 3,712 $ 2,659
Government authorities 2,053 4,900
Related parties 303 314
Other 961 770
Other accounts receivable and prepaid expenses $ 7,029 $ 8,643