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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Apr. 04, 2015
Jan. 03, 2015
Condensed Consolidated Balance Sheets    
Accounts receivable, net of allowances (in dollars) $ 5,200us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 4,177us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Allowance for unbilled services (in dollars) 2,187crai_AllowanceForUnbilledServices 2,233crai_AllowanceForUnbilledServices
Intangible assets, net of accumulated amortization (in dollars) $ 9,756us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ 9,584us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Preferred stock, par value (in dollars per share) $ 0us-gaap_PreferredStockNoParValue $ 0us-gaap_PreferredStockNoParValue
Preferred stock, shares authorized 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value ( in dollars per share ) $ 0us-gaap_CommonStockNoParValue $ 0us-gaap_CommonStockNoParValue
Common stock, shares authorized 25,000,000us-gaap_CommonStockSharesAuthorized 25,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 9,090,935us-gaap_CommonStockSharesIssued 9,228,272us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 9,090,935us-gaap_CommonStockSharesOutstanding 9,228,272us-gaap_CommonStockSharesOutstanding