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Commitments and Contingencies - Additional Information (Detail) - USD ($) | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jan. 31, 2014 | Apr. 30, 2016 | May. 04, 2013
Commitments and Contingencies Disclosure [Abstract] |  |  |
Estimated replacement cost |  |  | $ 672,000
Replacement cost charged against reserve | $ 406,000 |  |
Other accrued expenses |  | $ 266,000 |
Amount received from supplier for recovery | $ 450,000 |  |
Lower product prices period |  | Through fiscal 2017 |

X
- 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

X
- 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

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