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Income Taxes - Tax Effects of Temporary Differences that gave Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Jan. 31, 2015 | Jan. 31, 2014
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Deferred Tax Assets: |  |
Inventory | $ 1,666 us-gaap_DeferredTaxAssetsInventory | $ 1,792 us-gaap_DeferredTaxAssetsInventory
Share-Based Compensation | 572 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 535 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
State R&D Credits | 371 alot_DeferredTaxAssetsStateResearchAndDevelopmentCredits | 258 alot_DeferredTaxAssetsStateResearchAndDevelopmentCredits
Compensation Accrual | 417 alot_DeferredTaxAssetsCompensationAccruals | 493 alot_DeferredTaxAssetsCompensationAccruals
ASC 740 Liability Federal Benefit | 304 alot_DeferredTaxAssetsLiabilityFederalBenefit | 290 alot_DeferredTaxAssetsLiabilityFederalBenefit
Deferred Service Contract Revenue | 235 alot_DeferredTaxAssetsDeferredServiceContractRevenue | 181 alot_DeferredTaxAssetsDeferredServiceContractRevenue
Warranty Reserve | 140 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves | 137 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves
Reserve for Doubtful Accounts | 116 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts | 127 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Foreign Tax Credit | 356 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign | 213 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign
Other | 298 us-gaap_DeferredTaxAssetsOther | 119 us-gaap_DeferredTaxAssetsOther
Deferred Tax Assets, Total | 4,475 us-gaap_DeferredTaxAssetsGrossCurrent | 4,145 us-gaap_DeferredTaxAssetsGrossCurrent
Deferred Tax Liabilities: |  |
Accumulated Tax Depreciation in Excess of Book Depreciation | 766 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | 830 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Deferred Gain on Asset Held for Sale | 785 alot_DeferredTaxLiabilitiesDeferredGainOnAssetHeldForSale | 897 alot_DeferredTaxLiabilitiesDeferredGainOnAssetHeldForSale
Currency Translation Adjustment | 36 us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains | 173 us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains
Other | 87 us-gaap_DeferredTaxLiabilitiesOther | 78 us-gaap_DeferredTaxLiabilitiesOther
Deferred Tax Liabilities, Total | 1,674 us-gaap_DeferredIncomeTaxLiabilities | 1,978 us-gaap_DeferredIncomeTaxLiabilities
Subtotal | 2,801 alot_DeferredTaxAssetsLiabilitiesGross | 2,167 alot_DeferredTaxAssetsLiabilitiesGross
Valuation Allowance | (255)us-gaap_DeferredTaxAssetsValuationAllowance | (258)us-gaap_DeferredTaxAssetsValuationAllowance
Net Deferred Tax Assets | $ 2,546 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 1,909 us-gaap_DeferredTaxAssetsLiabilitiesNet

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- Definition Deferred tax assets state research and development credits. + References No definition available. + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from warranty reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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