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RELATED PARTY BALANCES AND TRANSACTIONS (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |
Amount of surveys services | $ 900 | $ 490 |
Revenues | $ 6,745 | 3,336 | $ 173
Compass Networks [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Cash consideration |  | $ 833 |
Percentage of acquisitions | 11.00% | 14.00% |
Compass Networks [Member] | Fully Diluted Basis [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Percentage of acquisitions | 7.00% | 11.00% |
Rad Bynet [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Reimbursements for services provided | $ 2,242 | $ 1,856 | 1,857
Fitel [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Revenues | 6,575 |  |
Inventories [Member] | Rad Bynet [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses | 152 | 78 | 1,325
Purchase Of Property And Equpment [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses | 46 | 148 | 224
Purchase Of Property And Equpment [Member] | Rad Bynet [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses | 46 | 148 | 224
Rent And Maintenance [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses | $ 1,936 | $ 1,960 | $ 1,849

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