Entity Central Index Key Document and entity information. Document And Entity Information [Abstract] Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Accrued liabilities and other liabilities current. Accrued liabilities and other liabilities noncurrent. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets Current [Abstract] Cash Cash And Cash Equivalents At Carrying Value Accounts receivable and unbilled revenue, net of allowance of $1,223 and $2,601 at June 29, 2018 and December 29, 2017, respectively Receivables Net Current Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Other assets Other Assets Noncurrent Goodwill, net Goodwill Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses and other liabilities Accrued Liabilities And Other Liabilities Current Total current liabilities Liabilities Current Non-current accrued expenses and other liabilities Accrued Liabilities And Other Liabilities Noncurrent Long-term deferred tax liability, net Deferred Tax Liabilities Noncurrent Long-term debt Long Term Debt Total liabilities Liabilities Commitments and contingencies Commitments And Contingencies Shareholders’ equity: Equity [Abstract] Preferred stock, $0.001 par value, 1,250,000 shares authorized; none issued and outstanding Preferred Stock Value Common stock, $0.001 par value, 125,000,000 shares authorized; 56,523,863 and 55,744,893 shares issued at June 29, 2018 and December 29, 2017, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Treasury stock, at cost, 27,071,782 and 26,945,776 shares June 29, 2018 and December 29, 2017, respectively Treasury Stock Value Accumulated deficit Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Total shareholders' equity Stockholders Equity Total liabilities and shareholders' equity Liabilities And Stockholders Equity Accounts receivable and unbilled revenue, allowance Allowance For Doubtful Accounts Receivable Current Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares issued Preferred Stock Shares Issued Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Treasury stock, at cost, shares Treasury Stock Shares Share based compensation included in cost of service. Contingent consideration liability adjustment included in cost of service. Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] Revenue before reimbursements. Revenue Before Reimbursements [Member] Revenue Before Reimbursements [Member] Reimbursements. Reimbursements [Member] Reimbursements [Member] Cost before reimbursements. Cost Before Reimbursements [Member] Cost Before Reimbursements [Member] Statement [Line Items] Statement [Line Items] Revenue: Revenues [Abstract] Total revenue Revenue From Contract With Customer Excluding Assessed Tax Costs and expenses: Costs And Expenses [Abstract] Cost of service: Cost Of Goods And Services Sold [Abstract] Contingent consideration liability adjustment Contingent Consideration Liability Adjustment Included In Cost Of Service Stock compensation expense Share Based Compensation Included In Cost Of Service Total cost of service Cost Of Goods And Services Sold Selling, general and administrative costs Selling General And Administrative Expense Stock compensation expense Allocated Share Based Compensation Expense Acquisition-related contingent consideration liability Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 Restructuring Restructuring Costs Total costs and operating expenses Costs And Expenses Income from operations Operating Income Loss Other expense: Nonoperating Income Expense [Abstract] Interest expense Interest Expense Income from operations before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Net income Net Income Loss Basic net income per common share: Earnings Per Share Basic [Abstract] Income per common share from operations Earnings Per Share Basic Weighted average common shares outstanding Weighted Average Number Of Shares Outstanding Basic Diluted net income per common share: Earnings Per Share Diluted [Abstract] Income per common share from operations Earnings Per Share Diluted Weighted average common and common equivalent shares outstanding Weighted Average Number Of Diluted Shares Outstanding Statement Of Income And Comprehensive Income [Abstract] Net income Foreign currency translation adjustment Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent Total comprehensive income Comprehensive Income Net Of Tax Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation expense Depreciation Amortization expense Amortization Of Intangible Assets Amortization of debt issuance costs Amortization Of Financing Costs Non-cash stock compensation expense Share Based Compensation Provision for doubtful accounts Provision For Doubtful Accounts Loss (gain) on foreign currency translation Foreign Currency Transaction Gain Loss Before Tax Release of valuation allowance Valuation Allowance Deferred Tax Asset Change In Amount Changes in assets and liabilities: Increase Decrease In Operating Capital [Abstract] (Increase) decrease in accounts receivable and unbilled revenue Increase Decrease In Accounts Receivable Increase in prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Decrease in accounts payable Increase Decrease In Accounts Payable Decrease in accrued expenses and other liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Decrease in income tax payable Increase Decrease In Accrued Income Taxes Payable Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of property and equipment Payments To Acquire Property Plant And Equipment Cash consideration paid for acquisitions Payments To Acquire Businesses Gross Cash acquired in acquisitions Cash Acquired From Acquisition Net cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from ESPP Proceeds From Stock Plans Proceeds from borrowings Proceeds From Issuance Of Debt Repayment of borrowings Repayments Of Long Term Debt Dividends paid Payments Of Dividends Exercise of stock options Proceeds From Stock Options Exercised Repurchase of common stock Payments For Repurchase Of Common Stock Net cash used in financing activities Net Cash Provided By Used In Financing Activities Effect of exchange rate on cash Effect Of Exchange Rate On Cash And Cash Equivalents Net decrease in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash at beginning of period Cash And Cash Equivalents At Carrying Value Including Discontinued Operations Cash at end of period Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for income taxes Income Taxes Paid Net Cash paid for interest Interest Paid Net Supplemental disclosure of non-cash acquisition financing activities: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Shares issued to sellers of Jibe Consulting Stock Issued1 Organization Consolidation And Presentation Of Financial Statements [Abstract] Basis of Presentation and General Information Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Earnings Per Share [Abstract] Net Income Per Common Share Earnings Per Share [Text Block] Accounts Receivable And Unbilled Revenue, Net [Abstract] Accounts Receivable and Unbilled Revenue, Net Loans Notes Trade And Other Receivables Disclosure [Text Block] Accrued liabilities and other liabilities. Accrued liabilities and other liabilities current. Accrued Liabilities And Other Liabilities Current [Abstract] Accrued Expenses and Other Liabilities Accrued Liabilities And Other Liabilities [Text Block] Restructuring And Related Activities [Abstract] Restructuring Costs Restructuring And Related Activities Disclosure [Text Block] Debt Disclosure [Abstract] Credit Facility Debt Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Stockholders Equity Note [Abstract] Shareholders' Equity Treasury Stock [Text Block] Related Party Transactions [Abstract] Transactions with Related Parties Related Party Transactions Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Litigation Legal Matters And Contingencies [Text Block] Geographic and service group information. Segment Reporting [Abstract] Geographic and Group Information Geographic And Service Group Information [Text Block] Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Use of Estimates Use Of Estimates Revenue Recognition Revenue Recognition Policy [Text Block] Fair Value Fair Value Of Financial Instruments Policy Business Combinations Business Combinations Policy Recently Issued Accounting Standards New Accounting Pronouncements Policy Policy [Text Block] Reclassifications Prior Period Reclassification Adjustment Description Summary of Disaggregation of Total Revenue Including Reimbursable Expenses Disaggregation Of Revenue Table [Text Block] Reconciliation Of Basic And Diluted Weighted Average Shares Schedule Of Weighted Average Number Of Shares Table [Text Block] Accounts Receivable and Unbilled Revenue, Net Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Schedule of accrued liabilities and other liabilities. Components Of Accrued Expenses And Other Liabilities Schedule Of Accrued Liabilities And Other Liabilities Table [Text Block] Geographic Revenue before Reimbursements Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Text Block] Long-Lived Assets Attributable To Geographic Area Schedule Of Entity Wide Disclosure On Geographic Areas Long Lived Assets In Individual Foreign Countries By Country [Text Block] Net revenue by service group. Revenue By Service Group Schedule Of Net Revenue By Service Group Table [Text Block] Schedule Of Business Acquisitions By Acquisition [Table] Schedule Of Business Acquisitions By Acquisition [Table] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Jibe Consulting, Inc. Jibe Consulting, Inc [Member] Jibe Consulting Inc [Member] AECUS Limited. Aecus Limited [Member] Aecus Limited [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Purchase Price Allocation Schedule Of Business Acquisitions By Acquisition [Text Block] Acquired Intangible Assets Schedule Of Finite Lived Intangible Assets Acquired As Part Of Business Combination [Text Block] Business relationship agreement period. Basis of presentation and general information. Basis of presentation and general information. Basis Of Presentation And General Information [Table] Basis Of Presentation And General Information [Table] Range Range [Axis] Range Range [Member] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Basis Of Presentation And General Information [Line Items] Basis Of Presentation And General Information [Line Items] Business relationship agreement period Business Relationship Agreement Period Revenue recognized as a result of change in contract liability Contract With Customer Liability Revenue Recognized Disaggregation Of Revenue [Abstract] Disaggregation Of Revenue [Table] Disaggregation Of Revenue [Table] Consulting. Consulting [Member] Consulting [Member] Software license sales. Software License Sales [Member] Software License Sales [Member] Disaggregation Of Revenue [Line Items] Disaggregation Of Revenue [Line Items] Customer contract period. Deferred commissions Deferred Sales Commission Commissions expense Amortization Of Deferred Sales Commissions Impairment loss recognized to capitalization of deferred commission Capitalized Contract Cost Impairment Loss Customer contract period Customer Contract Period The sum of dilutive potential unvested restricted stock units and common stock subject to vesting requirements used in the calculation of the diluted per-share or per-unit computation. The sum of dilutive potential stock options and stock appreciation rights used in the calculation of the diluted per-share or per-unit computation. Basic weighted average common shares outstanding Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees Dilutive Restricted Stock Units And Common Stock Subject To Vesting Requirements Common stock issuable upon the exercise of stock options and SARs Dilutive Stock Options And Stock Appreciation Rights Dilutive weighted average common shares outstanding Antidilutive common share equivalents Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Receivables Net Current [Abstract] Accounts receivable Accounts Receivable Gross Current Unbilled revenue Unbilled Receivables Current Allowance for doubtful accounts Accounts receivable and unbilled revenue, net Accrued compensation and benefits. Accrued share based compensation. Accrued compensation and benefits Accrued Compensation And Benefits Accrued bonuses Accrued Bonuses Current Accrued dividend payable Dividends Payable Current Acquisition earnout accruals Business Combination Contingent Consideration Liability Current Deferred revenue Deferred Revenue Current Accrued sales, use, franchise and VAT tax Sales And Excise Tax Payable Current Non-cash stock compensation accrual Accrued Share Based Compensation Income tax payable Accrued Income Taxes Current Other accrued expenses Other Accrued Liabilities Current Total accrued expenses and other liabilities Restructuring costs Restructuring Charges Remaining restructuring commitments Restructuring Reserve Line Of Credit Facility [Table] Line Of Credit Facility [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Term loan. Term Loan [Member] Term Loan [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving line of credit facility [Member] Revolving Credit Facility [Member] Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate L I B O R [Member] Base Rate [Member] Base Rate [Member] Line of Credit Facility [Line Items] Line Of Credit Facility [Line Items] Borrowing capacity under credit facility Line Of Credit Facility Maximum Borrowing Capacity Debt instrument, additional borrowing capacity. Additional borrowing capacity Debt Instrument Additional Borrowing Capacity Maturity date Line Of Credit Facility Expiration Date1 Term of debt Debt Instrument Term Pledge of capital stock to U.S. subsidiaries. Pledge of capital stock to direct foreign subsidiaries. Pledge of capital stock to U.S. subsidiaries Pledge Of Capital Stock To U S Subsidiaries Pledge of capital stock to direct foreign subsidiaries Pledge Of Capital Stock To Direct Foreign Subsidiaries Payment of principal Line Of Credit Facility Annual Principal Payment Outstanding balance Line Of Credit Facility Fair Value Of Amount Outstanding Margin percentage base rate Debt Instrument Basis Spread On Variable Rate1 Interest rate Debt Instrument Interest Rate Stated Percentage Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units R S U [Member] Common stock subject to vesting requirements. Common Stock Subject to Vesting Requirements [Member] Common Stock Subject To Vesting Requirements [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Shares granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted average grant-date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Shares outstanding Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Nonvested weighted average grant-date fair value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Compensation expense Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Weighted average period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Class Of Treasury Stock [Table] Class Of Treasury Stock [Table] Stock Appreciation Rights (SARs) [Member] Stock Appreciation Rights S A R S [Member] Share Repurchase Program Share Repurchase Program [Axis] Share Repurchase Program Share Repurchase Program [Domain] Stock repurchase. Share Repurchase Plan [Member] Stock Repurchase [Member] Equity, Class of Treasury Stock [Line Items] Equity Class Of Treasury Stock [Line Items] SARs outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Exercise price Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Expiration date Share Based Compensation Arrangement By Share Based Payment Award Expiration Date Additional treasury stock value acquired under repurchase plan. Repurchase of common stock Treasury Stock Shares Acquired Purchase price per share Treasury Stock Acquired Average Cost Per Share Total cost Treasury Stock Value Acquired Cost Method Amount available under repurchase plan Stock Repurchase Program Remaining Authorized Repurchase Amount1 Additional repurchase under plan Additional Treasury Stock Value Acquired Under Repurchase Plan Total authorized amount under stock repurchase plan Stock Repurchase Program Authorized Amount1 Shares repurchased for employee net vesting obligations, shares Shares Paid For Tax Withholding For Share Based Compensation Shares repurchased for employee net vesting obligations, value Adjustments Related To Tax Withholding For Share Based Compensation Annual cash dividend per share Common Stock Dividends Per Share Cash Paid Dividend payment Dividends Common Stock Cash Dividend declared Common Stock Dividends Per Share Declared Dividend declared, date of record Dividends Payable Date Of Record Day Month And Year Dividend declared, date of payment Dividend Payable Date To Be Paid Day Month And Year Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] Directors and executives. Director and Executives [Member] Directors And Executives [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Schedule Of Revenues From External Customers And Long Lived Assets [Table] Schedule Of Revenues From External Customers And Long Lived Assets [Table] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] North America [Member] North America [Member] International (primarily European countries). International (Primarily European Countries) [Member] International Primarily European Countries [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues From External Customers And Long Lived Assets [Line Items] Revenue before reimbursements Total long-lived assets Noncurrent Assets Goodwill included in foreign asset. Goodwill included in foreign assets Goodwill Included In Foreign Asset Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Legal Entity Legal Entity [Axis] Entity Entity [Domain] The Hackett Group. The Hackett Group [Member] Hackett Group [Member] SAP Solutions. SAP Solutions [Member] S A P Solutions [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Contingent Consideration by Type Contingent Consideration By Type [Axis] Contingent Consideration Type Contingent Consideration Type [Domain] Cash contingent consideration. Cash Contingent Consideration [Member] Cash Contingent Consideration [Member] Stock based contingent consideration. Stock Based Contingent Consideration [Member] Stock Based Contingent Consideration [Member] Title of Individual Title Of Individual [Axis] Relationship to Entity Title Of Individual With Relationship To Entity [Domain] Selling shareholders. Selling Shareholder's [Member] Selling Shareholders [Member] Key employees. Key Employees [Member] Key Employees [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Cost of Sales [Member] Cost Of Sales [Member] Sellers. Sellers [Member] Sellers [Member] Key personnel. Key Personnel [Member] Key Personnel [Member] Chartered Institute of Management Accountants. The Chartered Institute of Management Accountants [Member] Chartered Institute Of Management Accountants [Member] Effective date of acquisition Business Acquisition Effective Date Of Acquisition1 Business combination consideration transferred equity interests issued and issuable vesting period. Business combination contingent consideration arrangements period. Business combination contingent consideration cash share based compensation benefit expense. Purchase consideration Purchase consideration, common stock Business Combination Consideration Transferred Equity Interests Issued And Issuable Common stock vesting period Business Combination Consideration Transferred Equity Interests Issued And Issuable Vesting Period Contingent consideration Business Combination Contingent Consideration Liability Contingent consideration performance period Business Combination Contingent Consideration Arrangements Period Cash compensation benefit (expense) Business Combination Contingent Consideration Cash Share Based Compensation Benefit Expense Total purchase consideration Business Combination Consideration Transferred1 Cash Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents Accounts receivable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables Other current assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other Total current assets acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Intangible assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill Total assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Other accrued expenses Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other Total liabilities acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities Purchase consideration on acquisition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net Amortization period Finite Lived Intangible Assets Remaining Amortization Period1 Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Customer Base [Member] Customer Contracts [Member] Customer backlog. Customer Backlog [Member] Customer Backlog [Member] Non-Compete [Member] Noncompete Agreements [Member] Amount Finitelived Intangible Assets Acquired1 Useful Life (in years) Acquired Finite Lived Intangible Assets Weighted Average Useful Life Business acquisition pro forma income (loss) from continuing operations before depreciation amortization interest corporate overhead allocation and taxes. Contributed total revenue Business Acquisitions Pro Forma Revenue Contribution before depreciation, amortization, interest, corporate overhead allocation and taxes Business Acquisition Pro Forma Income Loss From Continuing Operations Before Depreciation Amortization Interest Corporate Overhead Allocation And Taxes Acquisition related costs Business Combination Acquisition Related Costs Acquired percentage Business Acquisition Percentage Of Voting Interests Acquired