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Share-Based Compensation - Share-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based compensation, Total | $ 511 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | $ 562 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax
Stock Options [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based compensation, Total | 241 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 192 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Restricted Stock Awards and Restricted Stock Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based compensation, Total | $ 270 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = alot_RestrictedStockAwardsAndRestrictedStockUnitsMember | $ 370 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax / us-gaap_AwardTypeAxis = alot_RestrictedStockAwardsAndRestrictedStockUnitsMember

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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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- Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |