XML 93 R73.htm IDEA: XBRL DOCUMENT
v3.20.4

TAXES ON INCOME (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Taxes On Income [Line Items] |  |  |
Period of tax exemption | 2 years |  |
Period in which investment must be made | 3 years |  |
Experation period since approval | 14 years |  |
Experation period since enterpise began operating | 12 years |  |
Effective corporate income tax rate | 23.00% | 23.00% | 23.00%
Net operating losses | $ 188,435 |  |
Capital loss | 8,298 |  |
Accrued interest and penalties | 134 |  |
Valuation allowance amount | $ 96,076 | $ 89,320 |
First Two Years [Member] | Minimum [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Foreign investors' company tax benefits pecent | 10.00% |  |
First Two Years [Member] | Maximum [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Foreign investors' company tax benefits pecent | 25.00% |  |
Preferred Technological Enterprise income [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Tax rate reduction percent | 12.00% |  |
Law For Encouragement Of Industry Taxes [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Industrial company defined as a company resident in Israel based on minimum percentage of income derived from an industrial enterprise owned by it | 90.00% |  |
Amortization period for deferred stock issuance costs | 3 years |  |
Norway [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Net operating losses | $ 20,116 |  |
Brazil [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Net operating losses | $ 34,040 |  |
Annual limit against taxable income | 30.00% |  |
Domestic Country [Member] | Minimum [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Effective corporate income tax rate | 21.00% |  |
Domestic Country [Member] | Maximum [Member] |  |  |
Taxes On Income [Line Items] |  |  |
Effective corporate income tax rate | 35.00% |  |

X
- Definition Represents the amortization period for deferred stock issuance costs under tax benefits allowed to industrial company. + References No definition available. + Details
Name: | crnt_BenefitsToIndustrialCompanyAmortizationPeriodForDeferredStockIssuanceCosts
Namespace Prefix: | crnt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Experation period since approval + References No definition available. + Details
Name: | crnt_ExperationPeriodSinceApproval
Namespace Prefix: | crnt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Experation period since enterpise began operating + References No definition available. + Details
Name: | crnt_ExperationPeriodSinceEnterpiseBeganOperating
Namespace Prefix: | crnt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Foreign investors' company tax benefits pecent + References No definition available. + Details
Name: | crnt_ForeignInvestorsCompanyTaxBenefitsPecent
Namespace Prefix: | crnt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the industrial company defined as a company resident in Israel based on minimum percentage of income derived from an industrial enterprise owned by it. + References No definition available. + Details
Name: | crnt_IndustrialCompanyDefinedAsCompanyResidentInIsraelBasedOnMinimumPercentageOfIncomeDerivedFromIndustrialEnterpriseOwnedByIt
Namespace Prefix: | crnt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Operating Loss Carryforwards, Annual Limitations on Use + References No definition available. + Details
Name: | crnt_OperatingLossCarryforwardsAnnualLimitationsOnUse
Namespace Prefix: | crnt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period in which investment must be made + References No definition available. + Details
Name: | crnt_PeriodInWhichInvestmentMustBeMade
Namespace Prefix: | crnt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of tax exemption + References No definition available. + Details
Name: | crnt_PeriodOfTaxExemption
Namespace Prefix: | crnt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Taxes On Income [Line Items] + References No definition available. + Details
Name: | crnt_TaxesOnIncomeLineItems
Namespace Prefix: | crnt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
Name: | us-gaap_DeferredTaxAssetsCapitalLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations attributable to deduction. Includes, but is not limited to, dividend deduction, deduction for dividend paid to employee stock ownership plan (ESOP), Medicare prescription drug benefit subsidy deduction, and other deductions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationDeductions
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_StatementScenarioAxis=crnt_FirstTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=crnt_PreferredTechnologicalEnterpriseIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=crnt_LawForEncouragementOfIndustryTaxesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=country_NO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=country_BR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |