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Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	Jan. 03, 2015
Foreign
Operating loss carryforwards
Net operating loss carryforwards	$ 9.9us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
Operating losses subject to expiration	0.2crai_OperatingLossCarryforwardsSubjectToExpiration / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
U.S. federal and U.S. state | NeuCo, Inc.
Operating loss carryforwards
Net operating loss carryforwards	10.4us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Federal | NeuCo, Inc.
Operating loss carryforwards
Operating losses available to offset the entity's consolidated taxable income	$ 0crai_OperatingLossAvailableToOffsetConsolidatedTaxableIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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- Definition

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+ References

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- Definition

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+ References

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

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