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Employee Retention Credit - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 31, 2021 | Jul. 31, 2021 | Jun. 30, 2021 | Jan. 31, 2021
Cost of Sales [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Employee Retention Credit Receivable - cost of revenue | $ 1,700,000 | $ 1,700,000 |  |
Selling and Marketing Expense [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Employee Retention Credit Receivable - selling and marketing | 800,000 | 800,000 |  |
Research and Development Expense [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Employee Retention Credit Receivable - research and development | 300,000 | 300,000 |  |
General and Administrative Expense [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Employee Retention Credit Receivable - general and administrative expenses | 300,000 | 300,000 |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Employee retention credit | 3,100,000 |  |  |
Cares Act [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Percentage of refundable tax credit can be claimed of qualified wages |  |  | 70.00% |
Threshold qualified wages per employee per calendar quarter |  |  | $ 10,000 |
Maximum threshold employee retention credit per employee per calendar quarter |  |  | $ 7,000 |
Percentage of reduction of gross Receipts to qualify for employee retention credit |  |  |  | 20.00%
Cares Act [Member] | Prepaid Expenses and Other Current Assets [Member] |  |  |  |
Employee Retention Credit Disclosure [Line Items] |  |  |  |
Employee Retention Credit Receivable - cost of revenue | $ 3,100,000 | $ 3,100,000 |  |

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- Definition Employee retention credit. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Employee retention credit disclosure [Line item]. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of refundable payroll taxes to be recognized as a reduction of Cost of revenue related to the Employee Retention Credit granted under the CARES act. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of refundable payroll taxes to be recognized as a reduction of general and administrative expenses related to the Employee Retention Credit granted under the CARES act. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Employee Retention Credit Receivable - Research and Development. + References No definition available. + Details
Name: | alot_EmployeeRetentionCreditReceivableResearchAndDevelopment
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of refundable payroll taxes to be recognized as a reduction of selling and marketing expense related to the Employee Retention Credit granted under the CARES act. + References No definition available. + Details
Name: | alot_EmployeeRetentionCreditReceivableSellingAndMarketing
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Maximum threshold employee retention credit per employee per calendar quarter. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Percentage of reduction of gross Receipts to qualify for employee retention credit. + References No definition available. + Details
Name: | alot_PercentageOfReductionOfGrossReceiptsToQualifyForEmployeeRetentionCredit
Namespace Prefix: | alot_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of refundable tax credit can be claimed of qualified wages. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Threshold qualified wages per employee per calendar quarter. + References No definition available. + Details
Name: | alot_ThresholdQualifiedWagesPerEmployeePerCalendarQuarter
Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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- Details
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- Details
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- Details
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- Details
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Period Type: |