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Discontinued Operations - Additional Information (Detail) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2015 | Jan. 31, 2013 | May 03, 2014 | Jan. 31, 2015
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |
Proceeds from sale | $ 1,800,000 us-gaap_ProceedsFromDivestitureOfBusinesses | $ 18,600,000 us-gaap_ProceedsFromDivestitureOfBusinesses |  |
Period of transition services and manufacturing, Maximum |  |  |  | 12 months
Transition Service Agreement expiration date |  |  |  | Jan. 31, 2014
Amount received from disposition of inventory |  |  | $ 2,355,000 alot_DiscontinuedOperationsAmountReceivedFromDispositionOfInventory | $ (2,355,000)alot_DiscontinuedOperationsAmountReceivedFromDispositionOfInventory

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- Definition Expiration date of original agreement to provide transition services to purchaser of Grass operation. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Discontinued Operations Amount Received From Disposition of Inventory. + References No definition available. + Details
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Namespace Prefix: | alot_
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- Definition Period company to provide transition services to purchaser of Grass operations under terms of original agreement. + References No definition available. + Details
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Namespace Prefix: | alot_
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Balance Type: | na
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- Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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