Entity Central Index Key Lessee operating lease liability payments due after year three. Cover [Abstract] Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key 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 Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity Shell Company Entity Shell Company Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, Address Line Two Entity Address Address Line2 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Accounts receivable and contract assets net. Accrued liabilities and other liabilities current. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets Current [Abstract] Cash Cash And Cash Equivalents At Carrying Value Accounts receivable and contract assets, net of allowance of $1,930 and $605 at October 1, 2021 and January 1, 2021, respectively Accounts Receivable And Contract Assets Net 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 Goodwill Operating lease right-of-use assets Operating Lease Right Of Use Asset 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 Contract liabilities (deferred revenue) Contract With Customer Liability Current Operating lease liabilities Operating Lease Liability Current Total current liabilities Liabilities Current Non-current deferred tax liability, net Deferred Income Tax Liabilities Net Operating lease liabilities Operating Lease Liability Noncurrent 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; 58,127,763 and 57,600,158 shares issued at October 1, 2021 and January 1, 2021, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Treasury stock, at cost, 28,346,796 and 27,609,752 shares October 1, 2021 and January 1, 2021, 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 Personnel costs before reimbursable expenses. Share based compensation included in cost of service. Reimbursable expenses. 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] Personnel costs before reimbursable expenses Personnel Costs Before Reimbursable Expenses Stock compensation expense Share Based Compensation Included In Cost Of Service Reimbursable expenses Reimbursable Expenses 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 Restructuring costs 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 Income from continuing operations Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Loss from discontinued operations Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Net income Net Income Loss Basic net income per common share: Earnings Per Share Basic [Abstract] Income per common share from continuing operations Income Loss From Continuing Operations Per Basic Share Loss per common share from discontinued operations Income Loss From Discontinued Operations Net Of Tax Per Basic Share Net income per common share Earnings Per Share Basic Diluted net income per common share: Earnings Per Share Diluted [Abstract] Income per common share from continuing operations Income Loss From Continuing Operations Per Diluted Share Loss per common share from discontinued operations Income Loss From Discontinued Operations Net Of Tax Per Diluted Share Net income per common share Earnings Per Share Diluted Weighted average common shares outstanding: Weighted Average Number Of Shares Outstanding [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic Diluted 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 (Increase) decrease in accounts receivables and contract assets. Increase (decrease) in accrued liabilities, other liabilities and operating lease liabilities. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Net income Profit Loss Plus net loss from discontinued operations Income Loss From Discontinued Operations Net Of Tax Net income from continuing operations 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 Gain on foreign currency translation Foreign Currency Transaction Gain Loss Before Tax Deferred income tax expense (benefit) Deferred Income Tax Expense Benefit Changes in assets and liabilities: Increase Decrease In Operating Capital [Abstract] (Increase) decrease in accounts receivable and contract assets Increase Decrease In Accounts Receivables And Contract Assets Decrease (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 Increase in accrued expenses and other liabilities and operating lease liabilities Increase Decrease In Accrued Liabilities Other Liabilities And Operating Lease Liabilities Increase in contract liabilities (deferred revenue) Increase Decrease In Contract With Customer Liability Increase 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 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 Debt issuance costs Payments Of Debt Issuance Costs Dividends paid Payments Of Dividends 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 Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Net increase in cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And 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 Statement Of Stockholders Equity [Abstract] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid In Capital [Member] Treasury Stock [Member] Treasury Stock [Member] Accumulated Deficit [Member] Retained Earnings [Member] Accumulated Other Comprehensive Loss [Member] Accumulated Other Comprehensive Income [Member] Balance Balance, Shares Shares Outstanding Issuance of common stock Stock Issued During Period Value Share Based Compensation Issuance of common stock, Shares Stock Issued During Period Shares Share Based Compensation Treasury stock purchased Treasury Stock Value Acquired Cost Method Treasury stock purchased, Shares Treasury Stock Shares Acquired Amortization of restricted stock units and common stock subject to vesting requirements Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition Dividends declared Dividends Common Stock Cash Net income (loss) Foreign currency translation Balance Ending Balance, Shares 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 Contract Assets, 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] Leases [Abstract] Leases Lessee Operating Leases [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 Stockholders Equity Note Disclosure [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] 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 Pandemic impact on our business. COVID-19 Pandemic Impact on Our Business Pandemic Impact On Our Business Policy [Text Block] Adoption of Recent 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 Contract Assets, 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] Schedule of Activity in Restructuring Expense Accruals Schedule Of Restructuring And Related Costs [Text Block] Components of Lease Expense Lease Cost Table [Text Block] Future Minimum Lease Payments Under Non-Cancellable Operating Leases Lessee Operating Lease Liability Maturity 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 Areas Schedule Of Entity Wide Disclosure On Geographic Areas Long Lived Assets In Individual Foreign Countries By Country [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] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Unusual or Infrequent Item, or Both Unusual Or Infrequent Item [Axis] Unusual or Infrequent Item, or Both Unusual Or Infrequent Item [Domain] COVID-19. COVID-19 [Member] C O V I D19 [Member] Accounting Standards Update Adjustments For New Accounting Pronouncements [Axis] Accounting Standards Update Type Of Adoption [Member] ASU 2019-12 [Member] Accounting Standards Update201912 [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 [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] Revenue before reimbursements from continuing operations Customer contract period. Deferred commissions Capitalized Contract Cost Net 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 Global workforce reduced, percentage Restructuring And Related Cost Number Of Positions Eliminated Period Percent Restructuring costs Restructuring Charges Asset impairment charges Asset Impairment Charges Change in accounting principle, accounting standards update, adoption date Change In Accounting Principle Accounting Standards Update Adoption Date Change in accounting principle, accounting standards update, adopted Change In Accounting Principle Accounting Standards Update Adopted Change in accounting principle, accounting standards update, immaterial effect Change In Accounting Principle Accounting Standards Update Immaterial Effect 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 Contract assets (unbilled revenue) Contract With Customer Asset Gross Current Allowance for doubtful accounts Accounts receivable and contract assets, net Accrued compensation and benefits. Accrued share based compensation. Accrued compensation and benefits Accrued Compensation And Benefits Deferred employer's payroll taxes Accrued Payroll Taxes Current Accrued bonuses Accrued Bonuses Current Accrued dividend payable Dividends Payable Current Restructuring liability Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Restructuring Liabilities 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 Schedule Of Restructuring And Related Costs [Table] Schedule Of Restructuring And Related Costs [Table] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Europe and Australia. Europe and Australia [Member] Europe And Australia [Member] Restructuring Cost And Reserve [Line Items] Restructuring Cost And Reserve [Line Items] Restructuring costs Restructuring Costs And Asset Impairment Charges Restructuring Reserve Restructuring Reserve Exit Closure and Consolidation of Facilities [Member] Restructuring Cost And Reserve [Axis] Type of Restructuring Type Of Restructuring [Domain] Employee Related Costs [Member] Employee Severance [Member] Exit, closure and consolidation of facilities. Exit Closure and Consolidation of Facilities [Member] Exit Closure And Consolidation Of Facilities [Member] Accrual beginning balance Cash paid Payments For Restructuring Accrual ending balance Lessee Lease Description [Table] Lessee Lease Description [Table] Lessee Lease Description [Line Items] Lessee Lease Description [Line Items] Operating leases terms Lessee Operating Lease Term Of Contract Operating lease cost Operating Lease Cost Total net lease costs Lease Cost Weighted average remaining lease term Operating Lease Weighted Average Remaining Lease Term1 Weighted average discount rate Operating Lease Weighted Average Discount Rate Percent Operating lease payments Operating Lease Payments 2021 (excluding the nine months ended October 1, 2021) Lessee Operating Lease Liability Payments Remainder Of Fiscal Year 2022 Lessee Operating Lease Liability Payments Due Next Twelve Months 2023 Lessee Operating Lease Liability Payments Due Year Two 2024 Lessee Operating Lease Liability Payments Due Year Three 2025 and thereafter Lessee Operating Lease Liability Payments Due After Year Three Total lease payments Lessee Operating Lease Liability Payments Due Less imputed interest Lessee Operating Lease Liability Undiscounted Excess Amount Total Operating Lease Liability Lessee, operating lease not yet commenced description Lessee Operating Lease Lease Not Yet Commenced Description Line Of Credit Facility [Table] Line Of Credit Facility [Table] 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 Maturity date Line Of Credit Facility Expiration Date1 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 Outstanding balance Line Of Credit Facility Fair Value Of Amount Outstanding Margin percentage base rate Debt Instrument Basis Spread On Variable Rate1 Commitment fees percentage Line Of Credit Facility Commitment Fee 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] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock Units [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 Repurchase of common stock Purchase price per share Treasury Stock Acquired Average Cost Per Share Total cost Amount available under repurchase plan Stock Repurchase Program Remaining Authorized Repurchase Amount1 Stock repurchase authorized 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 Dividend declared Common Stock Dividends Per Share Declared Dividend payment Dividends payable, date declared, year Dividends Payable Date Declared Year Dividends payable, date to be paid, year and month Dividends Payable Date To Be Paid 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] Director [Member] Director [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] Revenue from Continuing Operations Before Reimbursement [Member] 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 from continuing operations before reimbursements Total long-lived assets Noncurrent Assets Goodwill included in foreign asset. Goodwill included in foreign assets Goodwill Included In Foreign Asset