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Royalty Obligation - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 03, 2019 | Jun. 28, 2018 | Aug. 03, 2019 | Jul. 28, 2018 | Jan. 31, 2019 | Jan. 31, 2018
Guaranteed Minimum Royalty Payment |  |  | $ 2,500 |  |  |
Royalty Obligation, Current | $ 2,000 |  | 2,000 |  | $ 1,875 |
Royalty Obligation Non Current | 8,964 |  | 8,964 |  | 9,916 |
Accrued Royalties, Current, Excess Royalty Payment Due | 647 |  | $ 647 |  | $ 1,265 |
Honeywell Asset Purchase and License Agreement [Member] |  |  |  |  |  |
Payment Term Period |  |  | 10 years |  |  |
Minimum Royalty Payment Obligations |  |  |  |  |  | $ 15,000
Fair Value Assumption Percentage Of Present Value Factor |  |  | 2.80% |  |  |
Royalty Obligation, Current | 2,000 |  | $ 2,000 |  |  |
Royalty Obligation Non Current | 9,000 |  | 9,000 |  |  |
Excess Royalty Payments | $ 100 | $ 900 | $ 700 | $ 1,300 |  |

X
- Definition Accrued royalties in excess of guaranteed minimum royalty obligation- amount due within one year. + References No definition available. + Details
Name: | alot_AccruedRoyaltiesCurrentExcessRoyaltyPaymentDue
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of royalty expense paid in excess of guaranteed minimum payments. + References No definition available. + Details
Name: | alot_ExcessRoyaltyPayments
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair Value Assumption Percentage Of Present Value Factor + References No definition available. + Details
Name: | alot_FairValueAssumptionPercentageOfPresentValueFactor
Namespace Prefix: | alot_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Guaranteed minimum royalty payment. + References No definition available. + Details
Name: | alot_GuaranteedMinimumRoyaltyPayment
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum royalty payment obligations. + References No definition available. + Details
Name: | alot_MinimumRoyaltyPaymentObligations
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payment term period. + References No definition available. + Details
Name: | alot_PaymentTermPeriod
Namespace Prefix: | alot_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount of the short term portion of the guaranteed minimum royalty obligation related to Honeywell Agreement. + References No definition available. + Details
Name: | alot_RoyaltyObligationCurrent
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount of the long term portion of the guaranteed minimum royalty obligation related to Honeywell Agreement. + References No definition available. + Details
Name: | alot_RoyaltyObligationNonCurrent
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=alot_HoneywellAssetPurchaseAndLicenseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |