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v3.21.2

Royalty Obligation - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2021 | Jul. 31, 2021 | Jan. 31, 2021 | Jan. 31, 2018
Guaranteed Minimum Royalty Payment |  | $ 6,500,000 |  |
Royalty Obligation, Current | $ 2,000,000 | 2,000,000 | $ 2,000,000 |
Royalty Obligation Non Current | 5,261,000 | 5,261,000 | 6,161,000 |
Accrued Royalties, Current, Excess Royalty Payment Due | 24,000 | $ 24,000 | $ 177,000 |
Honeywell Asset Purchase and License Agreement [Member] |  |  |  |
Payment Term Period |  | 10 years |  |
Minimum Royalty Payment Obligations |  |  |  | $ 15,000,000.0
Fair Value Assumption Percentage Of Present Value Factor |  | 2.80% |  |
Royalty Obligation, Current | 2,000,000.0 | $ 2,000,000.0 |  |
Royalty Obligation Non Current | 5,300,000 | 5,300,000 |  |
Excess Royalty Payments | 24,000 | 24,000 |  |
Accrued Royalties, Current, Excess Royalty Payment Due | $ 25,000 | $ 25,000 |  |

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