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v2.4.1.9

Nature of Operations, Segment Reporting and Geographical Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Jan. 31, 2015 Segment Customer | Jan. 31, 2014 Customer
Segment Reporting Information [Line Items] |  |
Number of reporting segments | 2 us-gaap_NumberOfReportableSegments |
Customer accounted for greater than 10% of net sales | 0 alot_NumberOfCustomersAccountingForCreditRisk | 0 alot_NumberOfCustomersAccountingForCreditRisk
Goodwill assigned | $ 991 us-gaap_Goodwill | $ 991 us-gaap_Goodwill
T&M [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill assigned | $ 1,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember | $ 1,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember

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- Definition Number of customers accounting for credit risk. + References No definition available. + Details
Name: | alot_NumberOfCustomersAccountingForCreditRisk
Namespace Prefix: | alot_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=alot_TestAndMeasurementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |