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Quarterly Financial Information (Unaudited Supplemental Quarterly Financial Information) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 02, 2015 | Sep. 26, 2014 | Jun. 27, 2014 | Mar. 28, 2014 | Dec. 27, 2013 | Sep. 27, 2013 | Jun. 28, 2013 | Mar. 29, 2013 | Jan. 02, 2015 | Dec. 27, 2013 | Dec. 28, 2012
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue before reimbursements |  |  |  |  |  |  |  |  | $ 213,519 us-gaap_SalesRevenueServicesNet | $ 200,391 us-gaap_SalesRevenueServicesNet | $ 199,749 us-gaap_SalesRevenueServicesNet
Reimbursements |  |  |  |  |  |  |  |  | 23,218 us-gaap_ReimbursementRevenue | 23,439 us-gaap_ReimbursementRevenue | 22,987 us-gaap_ReimbursementRevenue
Total revenue | 60,343 us-gaap_Revenues | 60,437 us-gaap_Revenues | 61,052 us-gaap_Revenues | 54,905 us-gaap_Revenues | 52,604 us-gaap_Revenues | 57,916 us-gaap_Revenues | 58,961 us-gaap_Revenues | 54,349 us-gaap_Revenues | 236,737 us-gaap_Revenues | 223,830 us-gaap_Revenues | 222,736 us-gaap_Revenues
Cost of service: |  |  |  |  |  |  |  |  |  |  |
Personnel costs before reimbursable expenses (includes $686, $999, $842 and $1,029 of stock compensation expense in Q1, Q2, Q3 and Q4 2014) |  |  |  |  |  |  |  |  | 138,958 us-gaap_CostOfServices | 130,456 us-gaap_CostOfServices | 125,912 us-gaap_CostOfServices
Reimbursable expenses |  |  |  |  |  |  |  |  | 23,218 us-gaap_CostOfReimbursableExpense | 23,439 us-gaap_CostOfReimbursableExpense | 22,987 us-gaap_CostOfReimbursableExpense
Total cost of service |  |  |  |  |  |  |  |  | 162,176 us-gaap_CostOfRevenue | 153,895 us-gaap_CostOfRevenue | 148,899 us-gaap_CostOfRevenue
Selling, general and administrative costs (includes $653, $691, $814 and $656 of stock compensation expense in Q1, Q2, Q3 and Q4 2014) |  |  |  |  |  |  |  |  | 61,386 us-gaap_SellingGeneralAndAdministrativeExpense | 54,208 us-gaap_SellingGeneralAndAdministrativeExpense | 56,997 us-gaap_SellingGeneralAndAdministrativeExpense
Bargain purchase gain from acquisition |  |  |  |  |  |  |  |  | (3,015)us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount |  |
Restructuring costs |  |  |  | 3,600 us-gaap_RestructuringCosts |  |  |  |  | 3,604 us-gaap_RestructuringCosts |  | (211)us-gaap_RestructuringCosts
Total costs and operating expenses |  |  |  |  |  |  |  |  | 224,151 us-gaap_CostsAndExpenses | 208,103 us-gaap_CostsAndExpenses | 205,685 us-gaap_CostsAndExpenses
Operating income | 4,181 us-gaap_OperatingIncomeLoss | 5,059 us-gaap_OperatingIncomeLoss | 5,026 us-gaap_OperatingIncomeLoss | (1,680)us-gaap_OperatingIncomeLoss | 2,396 us-gaap_OperatingIncomeLoss | 4,717 us-gaap_OperatingIncomeLoss | 5,085 us-gaap_OperatingIncomeLoss | 3,529 us-gaap_OperatingIncomeLoss | 12,586 us-gaap_OperatingIncomeLoss | 15,727 us-gaap_OperatingIncomeLoss | 17,051 us-gaap_OperatingIncomeLoss
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 6 us-gaap_InvestmentIncomeInterest | 7 us-gaap_InvestmentIncomeInterest | 20 us-gaap_InvestmentIncomeInterest
Interest expense |  |  |  |  |  |  |  |  | (626)us-gaap_InterestExpense | (472)us-gaap_InterestExpense | (630)us-gaap_InterestExpense
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  | 11,966 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 15,262 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 16,441 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax (benefit) expense |  |  |  |  |  |  |  |  | 2,255 us-gaap_IncomeTaxExpenseBenefit | 6,398 us-gaap_IncomeTaxExpenseBenefit | (478)us-gaap_IncomeTaxExpenseBenefit
Income from continuing operations | 4,691 us-gaap_IncomeLossFromContinuingOperations | 3,591 us-gaap_IncomeLossFromContinuingOperations | 3,475 us-gaap_IncomeLossFromContinuingOperations | (2,046)us-gaap_IncomeLossFromContinuingOperations | 1,206 us-gaap_IncomeLossFromContinuingOperations | 2,699 us-gaap_IncomeLossFromContinuingOperations | 2,930 us-gaap_IncomeLossFromContinuingOperations | 2,029 us-gaap_IncomeLossFromContinuingOperations | 9,711 us-gaap_IncomeLossFromContinuingOperations | 8,864 us-gaap_IncomeLossFromContinuingOperations | 16,919 us-gaap_IncomeLossFromContinuingOperations
Loss from discontinued operations |  |  |  |  |  | (64)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | (71)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity |  | (135)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | (222)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income | 4,691 us-gaap_NetIncomeLoss | 3,591 us-gaap_NetIncomeLoss | 3,475 us-gaap_NetIncomeLoss | (2,046)us-gaap_NetIncomeLoss | 1,206 us-gaap_NetIncomeLoss | 2,635 us-gaap_NetIncomeLoss | 2,930 us-gaap_NetIncomeLoss | 1,958 us-gaap_NetIncomeLoss | 9,711 us-gaap_NetIncomeLoss | 8,729 us-gaap_NetIncomeLoss | 16,697 us-gaap_NetIncomeLoss
Basic net income per common share: |  |  |  |  |  |  |  |  |  |  |
Income per common share from continuing operations | $ 0.17 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.13 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.12 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.09 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.10 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.06 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.34 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.29 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.54 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Loss per common share from discontinued operations |  |  |  |  |  |  |  |  |  |  | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Net income per common share | $ 0.17 us-gaap_EarningsPerShareBasic | $ 0.13 us-gaap_EarningsPerShareBasic | $ 0.12 us-gaap_EarningsPerShareBasic | $ (0.07)us-gaap_EarningsPerShareBasic | $ 0.04 us-gaap_EarningsPerShareBasic | $ 0.09 us-gaap_EarningsPerShareBasic | $ 0.10 us-gaap_EarningsPerShareBasic | $ 0.06 us-gaap_EarningsPerShareBasic | $ 0.34 us-gaap_EarningsPerShareBasic | $ 0.29 us-gaap_EarningsPerShareBasic | $ 0.53 us-gaap_EarningsPerShareBasic
Diluted net income per common share: |  |  |  |  |  |  |  |  |  |  |
Income per common share from continuing operations | $ 0.16 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.12 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.12 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.08 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.09 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.07 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.33 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.28 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.51 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Loss per common share from discontinued operations |  |  |  |  |  |  |  | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare |  | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Net income per common share | $ 0.16 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted | $ 0.12 us-gaap_EarningsPerShareDiluted | $ (0.07)us-gaap_EarningsPerShareDiluted | $ 0.04 us-gaap_EarningsPerShareDiluted | $ 0.08 us-gaap_EarningsPerShareDiluted | $ 0.09 us-gaap_EarningsPerShareDiluted | $ 0.06 us-gaap_EarningsPerShareDiluted | $ 0.33 us-gaap_EarningsPerShareDiluted | $ 0.27 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted
Weighted average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  | 28,718,263 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 30,283,298 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 31,703,544 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted |  |  |  |  |  |  |  |  | 29,881,002 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 32,115,665 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 33,510,712 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Impact Of Acquisition-Related Purchase Consideration [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue before reimbursements | 54,551 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 54,550 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 55,000 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 49,418 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Reimbursements | 5,792 us-gaap_ReimbursementRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 5,887 us-gaap_ReimbursementRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 6,052 us-gaap_ReimbursementRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 5,487 us-gaap_ReimbursementRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Total revenue | 60,343 us-gaap_Revenues / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 60,437 us-gaap_Revenues / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 61,052 us-gaap_Revenues / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 54,905 us-gaap_Revenues / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Cost of service: |  |  |  |  |  |  |  |  |  |  |
Personnel costs before reimbursable expenses (includes $686, $999, $842 and $1,029 of stock compensation expense in Q1, Q2, Q3 and Q4 2014) | 34,205 us-gaap_CostOfServices / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 35,142 us-gaap_CostOfServices / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 35,427 us-gaap_CostOfServices / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 34,184 us-gaap_CostOfServices / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Reimbursable expenses | 5,792 us-gaap_CostOfReimbursableExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 5,887 us-gaap_CostOfReimbursableExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 6,052 us-gaap_CostOfReimbursableExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 5,487 us-gaap_CostOfReimbursableExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Total cost of service | 39,997 us-gaap_CostOfRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 41,029 us-gaap_CostOfRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 41,479 us-gaap_CostOfRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 39,671 us-gaap_CostOfRevenue / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Selling, general and administrative costs (includes $653, $691, $814 and $656 of stock compensation expense in Q1, Q2, Q3 and Q4 2014) | 16,122 us-gaap_SellingGeneralAndAdministrativeExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 15,422 us-gaap_SellingGeneralAndAdministrativeExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 15,607 us-gaap_SellingGeneralAndAdministrativeExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 14,235 us-gaap_SellingGeneralAndAdministrativeExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Bargain purchase gain from acquisition |  |  |  | (3,015)us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Restructuring costs |  |  |  | 3,604 us-gaap_RestructuringCosts / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Total costs and operating expenses | 56,119 us-gaap_CostsAndExpenses / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 56,451 us-gaap_CostsAndExpenses / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 57,086 us-gaap_CostsAndExpenses / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 54,495 us-gaap_CostsAndExpenses / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Operating income | 4,224 us-gaap_OperatingIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 3,986 us-gaap_OperatingIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 3,966 us-gaap_OperatingIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 410 us-gaap_OperatingIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest income | 2 us-gaap_InvestmentIncomeInterest / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 2 us-gaap_InvestmentIncomeInterest / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 1 us-gaap_InvestmentIncomeInterest / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 1 us-gaap_InvestmentIncomeInterest / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Interest expense | (163)us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | (173)us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | (166)us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | (124)us-gaap_InterestExpense / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Income from continuing operations before income taxes | 4,063 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 3,815 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 3,801 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 287 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Income tax (benefit) expense | 521 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 879 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 973 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | (118)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Net income | $ 3,542 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 2,936 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 2,828 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 405 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Basic net income per common share: |  |  |  |  |  |  |  |  |  |  |
Net income per common share | $ 0.130 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 0.100 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 0.100 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 0.010 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Diluted net income per common share: |  |  |  |  |  |  |  |  |  |  |
Net income per common share | $ 0.120 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 0.100 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 0.100 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | $ 0.010 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Weighted average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |
Basic | 28,257,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 28,558,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 28,939,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 29,120,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |
Diluted | 29,871,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 29,800,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 29,984,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember | 29,869,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementScenarioAxis = hckt_ImpactOfAcquisitionRelatedPurchaseConsiderationMember |  |  |  |  |  |  |

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