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Basis of Presentation and General Information (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 3 Months Ended
Jan. 02, 2015
segment
customer
Dec. 27, 2013
customer
Dec. 28, 2012
customer
Mar. 16, 2015
Basis Of Presentation And General Information [Line Items]        
Annual cash dividend per share $ 0.12us-gaap_CommonStockDividendsPerShareCashPaid $ 0.10us-gaap_CommonStockDividendsPerShareCashPaid $ 0.10us-gaap_CommonStockDividendsPerShareCashPaid  
Period of intangible assets amortized 5 years      
Goodwill write off $ 0.2us-gaap_GoodwillImpairmentLoss      
Future amortization expense, 2015 2.2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths      
Future amortization expense, 2016 1.2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo      
Future amortization expense, 2017 1.3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree      
Future amortization expense, 2018 $ 1.3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour      
Common stock excluded from reconciliation 0.3hckt_CommonStockEquivalentsExcludedInDilutedEarningsPerShare 0.8hckt_CommonStockEquivalentsExcludedInDilutedEarningsPerShare 3.9hckt_CommonStockEquivalentsExcludedInDilutedEarningsPerShare  
Number of customers accounted for more than five percent of revenue 0hckt_NumberOfCustomersAccountedForMoreThanFivePercentOfRevenue 0hckt_NumberOfCustomersAccountedForMoreThanFivePercentOfRevenue 0hckt_NumberOfCustomersAccountedForMoreThanFivePercentOfRevenue  
Number of operating segments 1us-gaap_NumberOfOperatingSegments      
Minimum [Member]        
Basis Of Presentation And General Information [Line Items]        
Useful life of property and equipments 3 years      
Provisions apply to specific employees 6 months      
Maximum [Member]        
Basis Of Presentation And General Information [Line Items]        
Useful life of property and equipments 7 years      
Provisions apply to specific employees 12 months      
Subsequent Event [Member]        
Basis Of Presentation And General Information [Line Items]        
Dividend declared       $ 0.14us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember