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RELATED PARTY BALANCES AND TRANSACTIONS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Amount of surveys services	$ 490
Compass Networks [Member]
Related Party Transaction [Line Items]
Cash consideration	$ 833
Percentage of acquisitions	11.00%
Rad Bynet [Member]
Related Party Transaction [Line Items]
Reimbursements for services provided	$ 1,856	$ 1,857	$ 1,668
Inventories [Member] | Rad Bynet [Member]
Related Party Transaction [Line Items]
Expenses	78	1,325	2,866
Purchase Of Property And Equpment [Member]
Related Party Transaction [Line Items]
Expenses	148	224	1,019
Purchase Of Property And Equpment [Member] | Rad Bynet [Member]
Related Party Transaction [Line Items]
Expenses	148	224	1,019
Rent And Maintenance [Member]
Related Party Transaction [Line Items]
Expenses	$ 1,960	$ 1,849	$ 1,963

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- Definition

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+ References

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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-Section 50
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Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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