XML 93 R74.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Income Taxes - Additional Information (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 30, 2023 USD ($)
Operating Loss Carryforwards |
Deferred tax liability recognized, undistributed foreign earnings | $ 0.5
United Kingdom |
Operating Loss Carryforwards |
UK subsidiary distribution of earnings | 10.2
Foreign exchange translation on distribution | 0.1
U.S. and Foreign |
Operating Loss Carryforwards |
Net operating loss carryforwards | 2.6
Increase in operating loss carryforwards | 0.3
Decrease in valuation allowance | $ 0.7
U.S. and Foreign | Minimum |
Operating Loss Carryforwards |
Operating loss carryforward lives | 20 years
Foreign Tax Authority | Minimum |
Operating Loss Carryforwards |
Operating loss carryforward lives | 40 years

X
- Definition Increase (Decrease) in Operating Loss Carryforwards + References No definition available. + Details
Name: | crai_IncreaseDecreaseInOperatingLossCarryforwards
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Operating Loss Carryforward Lives + References No definition available. + Details
Name: | crai_OperatingLossCarryforwardLives
Namespace Prefix: | crai_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Operating Loss Carryforwards, Increase (Decrease) in Valuation Allowance + References No definition available. + Details
Name: | crai_OperatingLossCarryforwardsIncreaseDecreaseInValuationAllowance
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-6 + Details
Name: | us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of foreign earnings repatriated from subsidiaries outside the country of domicile. + References No definition available. + Details
Name: | us-gaap_ForeignEarningsRepatriated
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cumulative translation gain (loss), before tax, from translating foreign currency financial statements into the reporting currency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-11 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-20 + Details
Name: | us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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