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Related Party Balances and Transactions (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Assets: |  |
Trade receivables, net | $ 20,266 | $ 4,388
Other accounts receivable and prepaid expenses | 2,685 | 1,960
Liabilities: |  |
Other accounts payables and accrued expenses | 3,428 | 2,081
Balances with related parties [Member] |  |
Assets: |  |
Trade receivables, net | 14,329 | 952
Other accounts receivable and prepaid expenses | 2 | 588
Liabilities: |  |
Trade payables | 63 | 169
Other accounts payables and accrued expenses | 140 | 92
Advances from customers |  | $ 1,880

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