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Product Replacement Costs - Additional Information (Detail) (USD $) | 12 Months Ended
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Jan. 31, 2014
Other Income And Expenses [Abstract] |
Estimated replacement cost | $ 672,000
Recovery expenses | 192,000
Other accrued expenses | 480,000
Amount received from supplier for recovery | $ 450,000
Lower product prices period | 3 years

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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Estimated replacement cost of product. + References No definition available. + Details
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Namespace Prefix: | alot_
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Balance Type: | debit
Period Type: | duration

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- Definition Period to receive lower product prices from supplier. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Recovery expenses settlement amount. + References No definition available. + Details
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Balance Type: | credit
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- Definition Settlement amount received from supplier for recovery of cost and expenses. + References No definition available. + Details
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Namespace Prefix: | alot_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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