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Securities Available for Sale - Additional Information (Detail) (USD $) | 12 Months Ended
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Jan. 31, 2014
Schedule of Held-to-maturity Securities [Line Items] |
Impairment charges on available for sale security | $ 0
Minimum [Member] |
Schedule of Held-to-maturity Securities [Line Items] |
Original maturity of short-term investments | 90 days
Anticipated maturity dates range | 1 month
Maximum [Member] |
Schedule of Held-to-maturity Securities [Line Items] |
Anticipated maturity dates range | 3 years

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- Definition Anticipated maturity date. + 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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- Definition Short Term Investment 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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- Definition The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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Balance Type: | debit
Period Type: | duration

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