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Fair Value - Additional Information (Detail) (Maximum [Member]) | 6 Months Ended
--- | ---
Aug. 02, 2014
Maximum [Member] |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |
Cash and cash equivalents, maturity period | 90 days

X
- Definition Cash And Cash Equivalents Maturity Period + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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