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