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Share-Based Compensation - Summarized Plan Activity (Detail) | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014
Equity [Abstract] |  |
Shares Reserved, Beginning Balance | 60,242 alot_SharesReservedUnderEmployeeStockPurchasePlan | 64,231 alot_SharesReservedUnderEmployeeStockPurchasePlan
Shares Purchased | (3,237)us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans | (3,989)us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
Shares Reserved, Ending Balance | 57,005 alot_SharesReservedUnderEmployeeStockPurchasePlan | 60,242 alot_SharesReservedUnderEmployeeStockPurchasePlan

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- Definition Shares reserved under employee stock purchase plan. + References No definition available. + Details
Name: | alot_SharesReservedUnderEmployeeStockPurchasePlan
Namespace Prefix: | alot_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

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- Definition Number of shares issued during the period as a result of an employee stock purchase plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration