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Securities Available for Sale - Additional Information (Detail) | 6 Months Ended
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Aug. 03, 2013
Schedule of Held-to-maturity Securities [Line Items] |
Short-term investment securities have original maturities greater than (days) | 90 days
Maximum [Member] |
Schedule of Held-to-maturity Securities [Line Items] |
Anticipated maturity dates range | 34 months
Minimum [Member] |
Schedule of Held-to-maturity Securities [Line Items] |
Anticipated maturity dates range | 1 month

X
- Definition Anticipated maturity date. + References No definition available. + Details
Name: | alot_AnticipatedMaturityDate
Namespace Prefix: | alot_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Short term investment securities original maturity greater than ninety days. + References No definition available. + Details
Name: | alot_ShortTermInvestmentSecuritiesOriginalMaturityGreaterThanNinetyDays
Namespace Prefix: | alot_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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