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CREDIT LOSSES (Narrative) (Details) $ in Thousands	Jan. 02, 2020 USD ($)
Allowance for Credit Loss [Abstract]
Noncash cumulative effect adjustment	$ 700

X

- Definition

Noncash cumulative effect adjustment.

+ References

No definition available.

+ Details

Name:	crnt_NoncashCumulativeEffectAdjustment
Namespace Prefix:	crnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_AllowanceForCreditLossAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration