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Nature of Operations, Segment Reporting and Geographical Information - Summary of Selected Financial Information by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | $ 88,347 us-gaap_SalesRevenueNet | $ 68,592 us-gaap_SalesRevenueNet
Long-Lived Assets | 11,077 us-gaap_NoncurrentAssets | 10,992 us-gaap_NoncurrentAssets
United States [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | 61,494 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 48,679 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Long-Lived Assets | 10,422 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US | 10,115 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
Europe [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | 18,181 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = exch_BATE | 14,909 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = exch_BATE
Long-Lived Assets | 383 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = exch_BATE | 538 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = exch_BATE
Canada [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | 3,934 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CA | 2,569 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CA
Long-Lived Assets | 272 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CA | 339 us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CA
Asia [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | 1,408 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember | 1,167 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Central and South America [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | 1,919 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = alot_CentralAndSouthAmericaMember | 908 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = alot_CentralAndSouthAmericaMember
Other [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net Sales | $ 1,411 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = alot_OtherCountriesMember | $ 360 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = alot_OtherCountriesMember

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