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Stock Based Compensation (Narrative) (Details) (USD $) | 0 Months Ended | 12 Months Ended | 1 Months Ended |
--- | --- | --- | --- | ---
Feb. 08, 2012 | Jan. 02, 2015 | Dec. 27, 2013 | Dec. 28, 2012 | Mar. 31, 2013 | Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total share based compensation |  | $ 6,370,000 us-gaap_ShareBasedCompensation | $ 6,119,000 us-gaap_ShareBasedCompensation | $ 5,522,000 us-gaap_ShareBasedCompensation |  |
Performance based stock option grant |  |  |  | 3,196,563 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |
Shares available for future issuance |  | 1,726,938 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |  |  |  |
Fair value | $ 1.31 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |  |  |  |
Performance based stock option grant, Exercise price | $ 4.00 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice |  |  | $ 4.00 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total share based compensation |  | 5,000,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 4,800,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember | 4,200,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |
Restricted stock units, vesting schedules options one |  | 4 years |  |  |  |
Restricted stock units, vesting schedules options two |  | 4 years |  |  |  |
Restricted stock units, vesting schedules options three |  | 3 years |  |  |  |
Percentage of vesting on restricted stock, option two, First anniversary |  | 25.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionTwoDuringAnniversaryOne / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option three, First anniversary |  | 33.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionThreeDuringAnniversaryOne / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option one, Second anniversary |  | 50.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionOneDuringAnniversaryTwo / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option two, Second anniversary |  | 25.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionTwoDuringAnniversaryTwo / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option three, Second anniversary |  | 33.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionThreeDuringAnniversaryTwo / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option one, Third anniversary |  | 25.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionOneDuringAnniversaryThree / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option two, Third anniversary |  | 25.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionTwoDuringAnniversaryThree / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option three, Third anniversary |  | 33.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionThreeDuringAnniversaryThree / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option one, Fourth anniversary |  | 25.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionOneDuringAnniversaryFour / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Percentage of vesting on restricted stock, option two, Fourth anniversary |  | 25.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentageUnderOptionTwoDuringAnniversaryFour / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Compensation expense related to nonvested restricted stock unit based awards |  | 6,500,000 hckt_EmployeeServiceShareBasedCompensationNonvestedRestrictedStockUnitAwardsNetCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |  |  |  |
Weighted average period, Restricted stock units |  | 1 year 11 months 9 days |  |  |  |
Common Stock Subject to Vesting Requirements [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total share based compensation |  | 900,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = hckt_CommonStockSubjectToVestingRequirementsMember | 800,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = hckt_CommonStockSubjectToVestingRequirementsMember | 700,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = hckt_CommonStockSubjectToVestingRequirementsMember |  |
Options vesting period |  | 5 years |  |  |  |
Compensation expense related to common stock subject to vesting requirements |  | 1,000,000 hckt_FutureCompensationExpenseRelatedToNonvestedCommonStockSubjectToVestingRequirements / us-gaap_AwardTypeAxis = hckt_CommonStockSubjectToVestingRequirementsMember |  |  |  |
Weighted average period, Common stock |  | 3 years |  |  |  |
Performance Shares [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total share based compensation |  | 500,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember | 500,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember | 600,000 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |
Performance based stock option grant | 2,916,563 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  | 2,916,563 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember | 2,916,563 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
Existing restricted stock unit Exchange Percentage | 50.00%hckt_ExistingRestrictedStockUnitBonusOpportunity / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  |  |  |
Growth of Pro-forma EPS Percentage | 50.00%hckt_PerformanceBasedStockOptionGrantProFormaEpsGrowthForVesting / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  |  |  |
Growth of Pro-forma EBITDA percentage | 50.00%hckt_PerformanceBasedStockOptionGrantProFormaEbitdaGrowthForVesting / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  |  |  |
Performance based stock option vesting term |  | 6 years |  |  |  |
Trailing period |  | 12 months |  |  |  |
Percentage of outstanding option on performance based |  | 100.00%hckt_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingOptionOnPerformanceBased / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  |  |
Performance Shares [Member] | Chief Executive Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Performance based stock option grant | 1,912,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |  |  |  |
Performance Shares [Member] | Chief Operating Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Performance based stock option grant | 1,004,063 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefOperatingOfficerMember |  |  |  |  |
Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Surrendered shares |  |  | 470,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |  |
Stock Appreciation Rights (SARs) And Stock Options [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Fair value |  |  |  | $ 1.31 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = hckt_StockAppreciationRightsSarsAndStockOptionsMember |  |
Minimum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Options vesting period |  | 4 years |  |  |  |
Maximum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Options vesting period |  | 10 years |  |  |  |
Technolab International Corporation [Member] | Common Stock Subject to Vesting Requirements [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total share based compensation |  | 0 us-gaap_ShareBasedCompensation / us-gaap_BusinessAcquisitionAxis = hckt_TechnolabInternationalCorporationMember / us-gaap_ContingentConsiderationByTypeAxis = hckt_CommonStockSubjectToVestingRequirementsMember |  |  |  |
Options vesting period |  | 4 years |  |  |  |
Technolab International Corporation [Member] | Scenario, Forecast [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, Equity Instruments Other than Options, Share-based Liabilities Paid |  |  |  |  |  | $ 4,600,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsTotalShareBasedLiabilitiesPaid / us-gaap_BusinessAcquisitionAxis = hckt_TechnolabInternationalCorporationMember / us-gaap_ContingentConsiderationByTypeAxis = hckt_CommonStockSubjectToVestingRequirementsMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of liabilities paid for share-based compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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