XML 48 R35.htm IDEA: XBRL DOCUMENT
v3.25.2

Forgivable Loans - Narrative (Details) $ in Thousands | 6 Months Ended
--- | ---
Jun. 28, 2025 USD ($) | Jun. 29, 2024 USD ($)
Forgivable Loans [Line Items] |  |
Accelerated amortization, involuntary termination | $ 40 | $ 5,700
Minimum |  |
Forgivable Loans [Line Items] |  |
Forgivable loan, term | 2 years |
Forgivable loans, interest rate (up to) | 0.0043 |
Maximum |  |
Forgivable Loans [Line Items] |  |
Forgivable loan, term | 8 years |
Forgivable loans, interest rate (up to) | 0.0512 |

X
- Definition Forgivable Loan, Term + References No definition available. + Details
Name: | crai_ForgivableLoanTerm
Namespace Prefix: | crai_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Forgivable Loans, Interest Rate + References No definition available. + Details
Name: | crai_ForgivableLoansInterestRate
Namespace Prefix: | crai_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Forgivable Loans [Line Items] + References No definition available. + Details
Name: | crai_ForgivableLoansLineItems
Namespace Prefix: | crai_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loans and Leases Receivable, Related Parties, Amortization, Involuntary Termination + References No definition available. + Details
Name: | crai_LoansAndLeasesReceivableRelatedPartiesAmortizationInvoluntaryTermination
Namespace Prefix: | crai_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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: |