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Shareholders' Equity (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended
Apr. 03, 2015
Mar. 28, 2014
Jan. 02, 2015
Equity, Class of Treasury Stock [Line Items]      
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Purchase price per share   $ 6.06us-gaap_TreasuryStockAcquiredAverageCostPerShare  
Repurchase of common stock   716us-gaap_TreasuryStockSharesAcquired  
Total cost   $ 4.3us-gaap_TreasuryStockValueAcquiredCostMethod  
Amount available under repurchase plan 3.0us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount    
Stock Repurchase A [Member]      
Equity, Class of Treasury Stock [Line Items]      
Purchase price per share $ 8.70us-gaap_TreasuryStockAcquiredAverageCostPerShare
/ us-gaap_ShareRepurchaseProgramAxis
= hckt_StockRepurchaseMember
   
Repurchase of common stock 75us-gaap_TreasuryStockSharesAcquired
/ us-gaap_ShareRepurchaseProgramAxis
= hckt_StockRepurchaseMember
   
Total cost $ 0.7us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_ShareRepurchaseProgramAxis
= hckt_StockRepurchaseMember