XML 102 R81.htm IDEA: XBRL DOCUMENT
v3.20.1

SEGMENTS, CUSTOMERS AND GEOGRAPHIC INFORMATION (Schedule Of Major Customer Data As Percentage Of Total Revenues) (Details) - Sales Revenue Goods Net [Member] | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Concentration Risk [Line Items] |  |  |
Percentage of total revenues |  | 21.10% | 27.30%
Affiliate Companies [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of total revenues |  | 19.60% | 12.30%
Affiliate Companies [Member] | Customer One [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of total revenues | 14.00% |  |
Affiliate Companies [Member] | Customer Two [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of total revenues | 11.80% |  |

X
- Definition Percentage of total revenues. + References No definition available. + Details
Name: | crnt_PercentageOfTotalRevenues
Namespace Prefix: | crnt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_OtherAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=crnt_IndianCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=crnt_IndonesianCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |