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Income Taxes - Components of Difference Between Provision for Income Taxes from Continuing Operations and Amount Computed by Applying Statutory Federal Income Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Provision at Statutory Rate	$ 2,357us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	$ 480us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
State Taxes, Net of Federal Tax Effect	233us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes	(47)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Change in Reserves Related to ASC 740 Liability	23alot_IncomeTaxReconciliationChangeInReserves	(59)alot_IncomeTaxReconciliationChangeInReserves
Meals and Entertainment	41us-gaap_IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	38us-gaap_IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment
Domestic Production Deduction	(164)us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities	(30)us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities
Share-Based Compensation	(25)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	36us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Tax-exempt Income	(24)us-gaap_IncomeTaxReconciliationTaxExemptIncome	(22)us-gaap_IncomeTaxReconciliationTaxExemptIncome
R&D Credits	(135)us-gaap_IncomeTaxReconciliationTaxCreditsResearch	(114)us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Foreign Rate Differential	(56)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential	(26)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Other Permanent Differences and Miscellaneous, Net	20us-gaap_IncomeTaxReconciliationOtherAdjustments	(81)us-gaap_IncomeTaxReconciliationOtherAdjustments
Total	$ 2,270us-gaap_IncomeTaxExpenseBenefit	$ 175us-gaap_IncomeTaxExpenseBenefit

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Income tax reconciliation change in reserves.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible meals and entertainment expense.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.

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