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SELECTED STATEMENTS OF OPERATIONS DATA (Narrative) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($)
Quarterly Financial Data [Abstract] |
Income (loss) resulting from devaluation of the local currency in Venezuela | $ 969

X
- Definition Represents the amount of foreign currency transaction remeasurement gain (loss) recognized in the income statement. + References No definition available. + Details
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Namespace Prefix: | crnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_QuarterlyFinancialDataAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration