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Product Replacement Costs - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2014 | May 04, 2013 | Jan. 31, 2017
Other Income and Expenses [Abstract] |  |  |
Estimated replacement cost |  | $ 0.7 |
Replacement cost charged against reserve |  |  | $ 0.4
Other accrued expenses |  |  | $ 0.2
Amount received from supplier for recovery | $ 0.5 |  |
Lower product prices period |  |  | Through the first quarter of fiscal 2017.

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- Definition Amount of reserve for settlement of remaining liability related to replacement program. + References No definition available. + Details
Name: | alot_AmountOfReserveForSettlementOfLiability
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Estimated cost of replacement program due to non-conforming parts. + References No definition available. + Details
Name: | alot_EstimatedCostOfReplacementProgram
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Period to receive lower product prices from supplier description. + References No definition available. + Details
Name: | alot_PeriodToReceiveLowerProductPricesFromSupplierDescription
Namespace Prefix: | alot_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Product Replacement Cost Charged Against Reserve + References No definition available. + Details
Name: | alot_ProductReplacementCostChargedAgainstReserve
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Settlement amount received from supplier for recovery of cost and expenses. + References No definition available. + Details
Name: | alot_SettlementAmountReceivedFromSupplierForRecoveryOfCostAndExpenses
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration