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Commitments and Contingencies - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended
Jan. 31, 2014
May 02, 2015
May 04, 2013
Commitments and Contingencies Disclosure [Abstract]      
Estimated replacement cost     $ 672,000alot_EstimatedReplacementCostOfProduct
Replacement cost charged against reserve   338,000alot_ProductReplacementCostChargedAgainstReserve  
Other accrued expenses   334,000alot_AmountOfReserveForSettlementOfLiability  
Amount received from supplier for recovery $ 450,000alot_SettlementAmountReceivedFromSupplierForRecoveryOfCostAndExpenses    
Lower product prices period   Through fiscal 2017