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Nature of Operations, Segment Reporting and Geographical Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Jan. 31, 2014 Segment Customer | Jan. 31, 2013 Customer
Segment Reporting Information [Line Items] |  |
Number of reporting segments | 2 |
Customer accounted for greater than 10% of net sales | 0 | 0
Goodwill assigned | $ 991 | $ 795
T&M [Member] |  |
Segment Reporting Information [Line Items] |  |
Goodwill assigned | $ 1,000 | $ 700

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- Definition Number of customers accounting for credit risk. + References No definition available. + Details
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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=14024403&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
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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
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration