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Product Replacement Costs - Additional Information (Detail) (USD $) | 12 Months Ended
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Jan. 31, 2015
Other Income and Expenses [Abstract] |
Estimated replacement cost | $ 672,000 alot_EstimatedReplacementCostOfProduct
Replacement cost charged against reserve | 319,000 alot_ProductReplacementCostChargedAgainstReserve
Other accrued expenses | 353,000 alot_AmountOfReserveForSettlementOfLiability
Amount received from supplier for recovery | $ 450,000 alot_SettlementAmountReceivedFromSupplierForRecoveryOfCostAndExpenses
Lower product prices period | Through fiscal 2017

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- Definition Amount of reserve for settlement of liability. + 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 replacement cost of product. + References No definition available. + Details
Name: | alot_EstimatedReplacementCostOfProduct
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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

X
- 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

X
- 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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- Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration