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Nature of Operations, Segment Reporting and Geographical Information - Net Sales and Segment Operating Profit for Each Reporting Segment (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jan. 31, 2015 | Jan. 31, 2014
Segment Reporting Information [Line Items] |  |
Net Sales | $ 88,347 us-gaap_SalesRevenueNet | $ 68,592 us-gaap_SalesRevenueNet
Corporate Expenses | 29,746 us-gaap_OperatingExpenses | 25,450 us-gaap_OperatingExpenses
Operating Income | 7,231 us-gaap_OperatingIncomeLoss | 1,533 us-gaap_OperatingIncomeLoss
Other Expense | 299 us-gaap_OtherNonoperatingExpense | 121 us-gaap_OtherNonoperatingExpense
Segment Operating Profit % of Net Sales | 14.60%alot_PercentageOfOperatingProfitToNetSales | 11.40%alot_PercentageOfOperatingProfitToNetSales
Income from Continuing Operations before Income Taxes | 6,932 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 1,412 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income Tax Provision for Continuing Operations | 2,270 us-gaap_IncomeTaxExpenseBenefit | 175 us-gaap_IncomeTaxExpenseBenefit
Income from Continuing Operations | 4,662 us-gaap_IncomeLossFromContinuingOperations | 1,237 us-gaap_IncomeLossFromContinuingOperations
Income from Discontinued Operations, Net of Taxes |  | 1,975 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net Income | 4,662 us-gaap_NetIncomeLoss | 3,212 us-gaap_NetIncomeLoss
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating Income | 12,886 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 7,809 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Operating Segments [Member] | QuickLabel [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Sales | 59,779 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_QuickLabelMember | 49,065 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_QuickLabelMember
Operating Income | 7,259 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_QuickLabelMember | 5,154 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_QuickLabelMember
Segment Operating Profit % of Net Sales | 12.10%alot_PercentageOfOperatingProfitToNetSales / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_QuickLabelMember | 10.50%alot_PercentageOfOperatingProfitToNetSales / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_QuickLabelMember
Operating Segments [Member] | T&M [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Sales | 28,568 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember | 19,527 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember
Operating Income | 5,627 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember | 2,655 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember
Segment Operating Profit % of Net Sales | 19.70%alot_PercentageOfOperatingProfitToNetSales / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember | 13.60%alot_PercentageOfOperatingProfitToNetSales / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = alot_TestAndMeasurementMember
Corporate Expenses [Member] |  |
Segment Reporting Information [Line Items] |  |
Product Replacement Costs |  | 672 alot_ProductReplacementRelatedCosts / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Corporate Expenses | $ 5,655 us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | $ 5,604 us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember

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- Definition Cost incurred to replace certain component parts of items manufactured due to non-compliant parts provided by a supplier and used in the manufacture of products. + References No definition available. + Details
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