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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Summary Of Significant Accounting Policies [Line Items]    
Highly liquid investments with an original maturity 90 days or less  
Cash of held in foreign bank accounts $ 2,995,000alot_CashHeldInForeignBankAccounts $ 2,544,000alot_CashHeldInForeignBankAccounts
Depreciation expense 1,361,000us-gaap_Depreciation 1,279,000us-gaap_Depreciation
Net foreign exchange losses 219,000us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyNetOfTaxPeriodIncreaseDecrease 190,000us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyNetOfTaxPeriodIncreaseDecrease
Advertising expense 1,717,000us-gaap_AdvertisingExpense 1,236,000us-gaap_AdvertisingExpense
Total reimbursement 129,000alot_HealthInsuranceEmployeeReimbursement 201,000alot_HealthInsuranceEmployeeReimbursement
Estimated outstanding reimbursements 20,000alot_HealthInsuranceReimbursementReserve 75,000alot_HealthInsuranceReimbursementReserve
Impairment charges for long-lived assets 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Write-down of asset held for sale 220,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf 779,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Impairment charges for intangible assets 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Number of common equivalent shares 156,600us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 126,800us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Compensation expenses is recognized for option forfeited $ 0alot_CompensationExpensesOfOptionForfeitedForNotRenderingInRequestedService  
Miltope's Ruggedized Printer Product Line Operation [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Completion date of acquisition Jan. 22, 2014  
Land Improvements [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 20 years  
Land Improvements [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 10 years  
Building and Improvements [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 45 years  
Building and Improvements [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 10 years  
Machinery and Equipment [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 10 years  
Machinery and Equipment [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of the assets 3 years